IS 3025-46 (1994): Methods of Sampling and Test …IS 3025 ( Part 4() ) : 1994 evaporate on a hot...
Transcript of IS 3025-46 (1994): Methods of Sampling and Test …IS 3025 ( Part 4() ) : 1994 evaporate on a hot...
Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.
इंटरनेट मानक
“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda
“Invent a New India Using Knowledge”
“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru
“Step Out From the Old to the New”
“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan
“The Right to Information, The Right to Live”
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
“Invent a New India Using Knowledge”
है”ह”ह
IS 3025-46 (1994): Methods of Sampling and Test (Physicaland Chemical) for Water and Wastewater, Part 46: Magnesium[CHD 32: Environmental Protection and Waste Management]
IS 3025 (Part 46) : 1994(Reaffirmed 2003)
'ifl'< rf)2J '"1/1Cf)
~ 3tR~~~~~(~ ~ '<'<1I<l~)
a~ -cRTa:rur~46~
(4e:df/~~)
Indian StandardMETHODS OF SAMPLING AND TEST
(PHYSICAL AND CHEMICAL) FOR WATERAND WASTEWATER
PART 46 MAGNESIUM
( First Revision)
Fifth Reprint MAY 2008(Including Amendment No. 1 & 2)
UOC 628.1.032 : 628.3 : 543.3 [ 546.46 ]
C BIS 1994
BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
February 1994 Price Group 4
Environmental Protection Sectional Committee, CHD 012
FOREWORD
This Indian Standard ( First Revision ) was adopted by the Bureau of Indian Standards, after thedraft finalized by the Environmental Protection Sectional Committee had been approved by theChemical Division Council.
Magnesium ranks eighth among the elements in order of abundance and is a common constituentof natural water. Magnesium salts are important contributors to the hardness of water whichbreak down when heated. forming scale in boilers. The magnesium concentration may varyfrom zero to several hundred milligrams. Chemical softening, reverse osmosis, electrodialysis,or ion exchange reduces the magnesium and associated hardness to acceptable levels.
The technical committee responsible for formulation of IS 3025 and IS 24118 and its parts, decidedto revise all the parts covered under them and publish it in separate parts.
This standard supersedes 34 of IS 3025 : 1964 and 6 of IS 2488 (Part 5) : 1976. In the preparationof this standard, considerable assistance has been derived from <Standard methods for the examination of water and wastewater' published by the American Public Health Association. Washington,USA, 17th Edition, 1989.
The composition of the technical committee responsible for the formulation of this IndianStandard is given in Annex A.
In reporting the result of a test or analysis made in accordance with this standard, if the finalvalue, observed or calculated, is to be rounded off, it shall be done in accordance with IS 2 : 1960'R ules for rounding off numerical values ( revised)'.
AMENDMENT NO. 1 SEPTEMBER 2000TO
IS 3025 ( PART 46 ) : t 994 METHODS OF SAMPLINGAND TEST ( PHYSICAL AND CHKMICAL) FOR WATER
AND WASTEWATERPART 46 MAGNESIUM
( First Revis..ion )
(Page 3, clause 6.4.8, line 3 ) - Insert the following JIlIIUer after the words"complexing agent' :
'Iike.Magnesium Slilt of 1, 2- cyclohexane diamine tetra acetic acrd (MgCDTA)'
(ClIO 12)
1 II} [)'~ptL of UIS/20QR
AMENHMENT NO. 2 MAH.CU 20('~
TOIS 3025( PART 46) ; J994 METHODS OF SAMPUN(~
AND TEST (PHYSICAl. AND CHEMICA L) 'FOIl \'':ATEI~
AND \\1ASTEWATER
PART 46 MAGNESIUM
(' First Revision )
(Page L, ilaus«: 5.5.1, lin, :?"' Slll>stilute '.10 tC»)(J m! /-,j -IU 1<J -'0 In'
( Page 4, dWH<'7.4.4, line :2) ,-- Suhvuture . MgU' lin '/l.lr,)·
(CHD 32 l
110 Deptt. of HlS.-':!Pllll
IS 3025 ( Part 46 ) : 1994
Indian Standard
METHODS OF SAMPLING AND TEST( PHYSICAL AND CHEMICAL) FOR WATER
AND WASTEWATERPART 46 MAGNESIUM
( First Revision)1 SCOPEThis standard prescribes three methods for thedetermination of magnesium:
a) Gravimetric method as magnesiumpyrophosphate;
b) Volumetric method using EDTA; andc) Atomic absorption spectrophotometric
method.2 REFERENCESThe Indian Standards listed below are thenecessary adjuncts to this standard:
IS No. Title
264 : 1964 Nitric acid (second revision)3025 t Part I ): Methods of sampling and test
1986 ( physical and chemical) forwater and wastewater: Part ISampling (first revision)
7022 ( Part I ): Glossary of terms relating to1973 water, sewage and industrial
effluents. Part I
7022 ( Part 2 ): Glossary of terms relating to1979 water, sewage and industrial
effluents, Part 23 TERMINOLOGYFor the purpose of this standard. definitionsgiven in IS 7022 (Part 1 ) : 1973 and IS 7022( Part 2 ) : 1979 shall apply.4 SAMPLING AND STORAGEThe sampling and storage shall he done asprescribed in IS 3025 ( Part I ) : 1986.5 GRAVIMETRIC METHOD AS MAGNESIUMPYROPHOSPHATE5.1 PrincipleDiammonium hydrogen phosphate quantitative!y precipitates magnesium in ammonicalsolution as magnesium ammonium phosphate.The precipitate is ignited and weighed asmagnesium pyrophosphate. Below 1 mg/ l,atom ic absorption spectrophotometric methodis desirable.
110Deptt. of BIS/2008
5.2 InterferenceThe solution should be reasonably free fromaluminium, calcium. iron, manganese silicastrontium and suspended matter. It shouldnot contain more than about 3·5 g ammoniumchloride.5.3 Apparatus
5.3.1 Vacuum Pump or Other Source of Vacuum5.3.2 Filter Flasks
5.3.3 Filter Crucibles - medium porosity; 30 011.
5.4 Reagents
5.4.1 Methyl Red Indicator Solution
Dissolve 100 mg of methyl red sodium salt indistilled water and dilute to 100 ml,
5.4.2 Hydrochloric Acid - 1 : I, 1 : 9 andI: 99.
S.4.3 Ammonium Oxalate Solution
Dissolve JO g ( NH4 )8 C20. + H.O In 250011distilled water. Filter, if necessary.
5.4.4 Ammonium Hydroxide - Concentrated I: 19.
5.4.5 Nitric Acid - Concentrated (see IS 264 :1964 ).
5.4.6 Diammonlum Hydrogen Phosphate SolutionDissolve 30 g of diammonium hydrogen phosphate (NH.)8 HPO. in distilled water andmake up to 100 ml.
5.4.7 Urea5.5 Procedure5.5.1 Pre-treatment of Polluted Water and WasteMl/Jter SamplesMix the sample pretreated if so required andtransfer a suitable volume (50 to 100 011) to250 ml conical flask or a beaker. Add 5 mlconcentrated nitric acid and a few boiling chipsor glass beads. Bring to a slow boil and
IS 3025 ( Part 4() ) : 1994
evaporate on a hot plate to the lowest volumepossible (about 10 to 20 m ) before precipitation or salting occurs. Add 5 ml concentratednitric acid cover with a watch glass and heat toobtain a gentle refluxing action. Continue heating and adding concentrated nitric acid asnecessary until digestion is complete as shownby a light-coloured clear solution. Do not letsample dry during digestion. Add I to 2 mlconcentrated nitric acid and warm slightly \0
dissolve any remaining residue. Wash downbeaker walls and watch glass with water andthen filter, if necessary. Transfer filtrate to100 ml volumetric flask, with two S-ml portionsof water adding these rinsings to the volumetricflask. Cool, dilute to mark and mix thoroughly.Take portions of this solution for the determination.
5.5.2 Removal of Calcium and Other Metals asOxalates
To 200 ml of the sample pretreated if so required containing about 50 mg of calcium, add afew drops of methyl red indicator and I: Ihydrochloric acid. Sufficient acid must bepresent in the solution to prevent the precipitation of calcium oxalate when ammoniumoxalate solution is added. Introduce SO ml ofammonium oxalate solution and ISg of urea.Boil the solution gently until the methyl redchanges its colour to yellow. Filter the precipitate and wash with small volume of coldwater until free from chloride.
S.5.3 Determination of Magnesium
To the combined filtrate and washings from5.5.2 containing not more than 60mg magnesiumadd 50 ml of concentrated nitric acid and evaporate carefully to dryness on a hot plate. Donot let reaction become too violent during thelater part of the evaporation stay in constantattendance to avoid losses through spattering.Moisten residue with 2 to 3 ml of concentratedhydrochloric acid, add 20 ml of distilled water,warm, filter and wash. To the filtrate add 3 011of concentrated hydrochloric acid 2 to 3drops of methyl red solution, and 10 ml of( NH, ).HPO, solution. Cool and add concentrated ammonium hydroxide drop by drop, stirringconstantly until the colour changes to yellow, stirfor 5 minutes add again S ml of concentratedammonium hydroxide and stir vigorously for10 minutes more. Let it stand overnight andfilter through filter paper. Wash with 1: 19ammonium hydroxide. Transfer to an ignited,cooled and weighed crucible. Dry precipitatethoroughly and burn paper off slowly, allowingcirculation of air. Heat at about SOO°C untilresidue is white. Ignite for 30 minutes at1 100°C to constant mass.
2
5.5.4 Calculation
M · I' Magnesrum, mg/ltre = V x 21S·4x 101
where
M = mass in mg of magnesium pyrophosphate, and
V = volume in rnl of sample.
5.6 Precision and Accuracy
The method is precise to ± 0·5 mg or better,and the accuracy is comparable if interferencesarc absent.
6 VOLUMETRIC METHOD USING EDTA
6.1 Principle
When water sample containing both calciuman.d mag~esium is titrated with EDTA at pH 10,USing Eriochrorne black-T as indicator, whichestimates values of calcium and magnesium. Ina separate titration against EDTA at pH 12 to13 range using murexide or Patton and Reeder'sindicator, calcium is selectively estimated.From I hese two values magnesium contentmay be calculated. Below I mgll concentration it is desirable to use atomic absorptionspectrophotometric method.
6.2 Interference
Some metal ions form complexes with EDTAand interfere in the process of determinationof calcium and magnesium by EDTA methodby causing fading or indistinct end points. Thisinterference is reduced bv addition of certaininhibitors to the water samples prior to titrationwith EDTA.
6.3 Apparatus -- Hot plate.
6.4 Reagents
6.4.1 Indicator Solutions
6.4.1.1 Patton and Reeder and indicator solution
This indicator solution permits the directtitration of calcium in the presence of magnesium. It produces a sharp colour change fromwine red to pure blue at the end point. It isprepared by mixing 1 g of Patton and Reederreagent with 100 g of sodium chloride/potassium chloride.
6.4.1.1 Murexide (ammonium purpurate)indicator solution
This indicator changes from pink to purple atthe end point. An indicator solution can beprepared by dissolving ISO mg of the dye in100 g of absolute ethylene glycol. Water solutions of the dye are not stable Cor longer than
a day. A ground mixture of the dye powderand sodium chloride provides a stable formof the indicator. It is prepared by mixing200 mg of murexide with 100 g of solid sodiumchloride and grinding the mixture to 355 to 300microns. The tiration should be performedimmediatelv after the addition of the indicatorbecause it' is unstable under alkaline conditions. End point recognition is facilitated bythe preparation of colour comparison blankcontaining 2·0 ml of sodium hydroxide solution,0'2 g of solid indicator mixture ( or I to 2 dropsif a solution is used) and sufficient standardEDTA titrant ( 0·05 to 0·10 rnl) to produce anunchanging colour.
6.4.1.3 Eriochrome black T indicator (EBT Indicator)
Dissolve 0'5 g of EBT indicator and approximately 4·5 g of hydroxylamine hydrochloride in100 ml of rectified spirit (ethanol or methanol).
6.4.2 Standard Zinc Solution -- 0'01 M.
Dissolve 0'653 8 g of pure zinc dust or granulesof 99·9 percent purity in 20 ml of approximatelyI : I hydrochloric acid, warm if necessary. Cooland make up to I litre exactly in a volumetricflask. Preserve this solution in a tightly closedglass bottle.
6.4.3 Buffer Solution
a) Dissolve 70 g of ammonium chloride and570 ml of 30 percent ammonia solution(relative density 0·88 to 0,90) in waterand make up to I litre.
b) Sodium hydroxide I N '-' Dissolve 40 g ofsodium hydroxide and dilute to 1 litrewith distilled wate i ,
6.4.4 Standard Ethylene Diamine Tetra AceticAcid ( EDTA ) Solution - 0·001M.
Dissolve 3·75 g of disodium ethylene diaminetetra-acetate dihydrate in water and make up toI litre in a volumetric flask. Standardize thiswith standard zinc solution. Pipette out 25 mlof standard zinc solution in a 250 ml conicalflask. Adjust the pH to approximately 10 withbuffer solution. Dilute to about 100 ml andadd 3 to 4 drops of EBT indicator solution.This will give a red colour. Titrate with 0'01 Mof EDTA solution to a clear blue end pointfree from violet tinge. This solution will beslightly stronger than 0·01 M. Dilute the solution to exactly 0·0 I M by adding calculatedamount of water and recheck the strength bytitrating 25 ml of standard zinc solution by exactlythe same manner as given above. This shouldconsume exactly 25'0 ml of standard EDTAsolution.
3
IS 30Z~ ( ~art 46 ) : 1994
6.4.5 Triethanolamine Solution - 10 percent( tn]» ).
6.4.6 Potassium Cyanide Solution - 10 percent( mjv ).
NOTE - Preserve in a polyethylene bottle.
6.4.7 Hydroxylamine Hydrochloride Solution10 percent ( m/v ).
6.4.8 Inhibitor and Complexing Agents - Form-ist waters there is 110 need to utilize an inhibitor or cornplexing agent. Occasionally watercontaining interfering ions other than Ca++and Mg++ requires adding an appropriate inhibitor or cornplexing agents to give a clear,sharp change in colour to the cnd point, Avoidthe use of sodium cyanide inhibitor,
6.5 Pre-treatment of Polluted Water and Wastewater Samples
As prescribed in 5.5.1-
6.6 Determination of Calcium
6.6.1 Sample Preparation
Because of the high pH used in this procedure,the titration should be performed immediatelyafter the addition of the alkali and indicator.Use 50 ml of sample or a smaller portion diluted to 50 ml so that the calcium content is about5 to 10 mg. Analyse hard waters with alkalinity higher than 300 mgfl CaCOs by taking asmaller aliquot and diluting to 50 ml, or byneutralization of the alkalinity with acid, boiling for one minute and cooling before beginningthe titration.
6.6.2 Add 2'0 ml of sodium hydroxide solutionOf a volume sufficient to produce a pH of 12to 13. Stir. Add 0'1 to 0'2 g of the indicatormurexide-sodium chloride mixture selected (orI to 2 drops if a solution is used). Alternatively, approximately I g of the mixture ofPatton and Reeder reagent and sodium chlorideor potassium chloride may be used. Add EDTAtitrant slowly with continuous stirring to theproper end point. Check the end point by adding I to 2 drops of titrant in excess to makecertain that no further colour change occurs.Let the volume used be VI'
6.6.3 Determination of Magnesium
Take a suitable aliquot of the solution, expectedto contain approximately 10 to 3C mg of calciumand magnesium in a 500 ml conical flask. Addro ml of hydroxylamine hydrochloride solution,2 ml of potassium cyanide solution and 25 mlof triethanolamine solution. Dilute to 150to 200 ml and add sufficient quantity of buffersolution to bring the pH to 10'0 ± 0·1. Add3 to 4 drops of EBT indicator solution and
IS 3025 ( Part 46 ) : 19'4
7.5.2 Preparation of Blank Solution
Prepare a blank test simultaneously using thesame reagents in the same quantities andfollowing the same procedure, but replacing thevolume of the test sample used in 7.5.1 by equalvolume of water.
7.5.3 Preparation of Set of Calibration StandardSolutions
To a series of 100 ml volumetric flasks with theaid of pipettes add O. 2'5. S, 10. IS, 20 and25 ml of the magnesium standard solution( 7.4.4). add either 10 ml of the lanthanumchloride solution or 10 ml of the cesium chloride solution as in 7.5.1 and make up to themark with 0·1 N hydrochloric acid.7.5.4 Preparation of Calibration Curve
Aspirate the blank and calibration solutionswith aspirating distilled water in between. Notedown the absorbance value. Prepare calibrationcurve by plotting the absorbance readingsagainst concentration of magnesium standardsolution ( 7.5.3 ).
To a I litre volumetric flask add 24 g of lanthanum oxide ( La.Oa ) atomic absorption spectrometry grade ). Slowly and cautiously add 50 mlof concentrated hydrochloric acid while stirring to dissolve the lanthanum oxide. Makeup to the mark with water.
7.4.3 Cesium Chloride - 20 g/l of Cs.
Dissolve 25 g of cesium chloride in 1 litre ofO' I N hydrochloric acid.
7.4.4 Standard Magnesium Solution-l 000 rngll
Dry a portion of magnesium oxide ( MnO ) at180°C fer I hour. Weigh 1'66 ± 0·01 g anddissolve in 1 N hydrochloric acid. Dilute withthe same acid to I 000 ml in a volumetricflask. Store the solution in a polyethylenebottle.
7.5 Procedure
7.5.1 Preparation of Test Solution
Sample: containing particulate matter afteracidification shall be filtered to prevent clogging of the nebulizer and burner systems. Toa 100 ml volumetric flask, add 10 ml of lanthanum chloride solution ( 7.4.2) if an air-acetylene flame is to be used, or 10 ml of cesiumchloride solution (7.4.3) if a nitrous oxideacetylene flame is to be used. Add 10 ml oft he sample and make up to the mark with 0·1 Nhydrochloric acid.
NOTE -If the concentrario n or the sample is hi,her.then appropriately smaller volume of the sampleshall be used.
I 000 x ( V, - Vt )
V
NOTE - If magneaium i. net present. it should beadded as 1 : 1 magnesium EDTA complex. in orderto get the proper colour change at the end point.This can be done by either adding I ml of 0·1 magnesium EDTA ( 1 : 1 ) complex before proceeding fortitration, or. incorporating sm:111 amoun t of Mg. +ions in EDTA solution before its standardization.
7 ATOMIC ABSORPTION SPECTROPHOTOMETRIC METHOD
7.1 This method is applicable to the analysis ofraw and drinking waters ann can' be used forwaters having a magnesium content up to 5 mgper litre. For samples containing higher concentration smaJler volume of the sample must betaken for the analysis. In general nitrous oxideacetylene flame should be used if the composition of the sample is complex or unknown.
7.2 IDterfereaClI
Chemical interferences are common. Thesecan be overcome by the addition of a releasingagent. that is. lanthanum chloride [ if air-acetylene (oxidizing) flame is used] or cesiumchloride (if nitrous oxide-acetylene flame isused ).
7.3 Atomic absorption spectrophotometer setup and equipped with an appropriate burner forair-acetylene flame or nitrous oxide-acetyleneflame and a hollow cathode lamp for magnesiumwith wavelength of 285'2 nm,
7.4 Reagents
7.4.1 Hydrochloric Acid - 1 Nand 0'1 N.
7.4.2 Lanthanum Chloride - 20 gIl of La.
whereV == volume in ml of the sample taken for
the test;
Vt - volume in ml of BDAT consumed intitration for calcium determination inthe same aliquot of solution of sample;and
Va - volume in ml of EDTA solution consumed in titration.
6.6.4 Calculation
Magnesium ( as Mg ).mg/l percent 0'024 35 x
by mass :=-----...,--..>--....:....--':....:.
titrate with 0'01 M EDTA solution till the redcolour changes to pure blue end point freefrom violet tinge. It is easier to note the endpoint by comparing the colour with that ofpreviously titrated solution having a pure blueend point, where a slight excess of EDTAsolution has been added.
4
7.5.5 Aspirate the test solution (7.5•• ) andnote the absorbance value and read the concentration of magnesium from the calibration curve
. against the absorbance value obtained.
7.6 CalcalatloD
Magnesium V( as mg ), mgll = CX V:
where
C = concentration in mgll of magnesiumcalculated from the calibration curvehaving taken into account the blankvalue,
Vo - volume in mJ of the original sampletaken for analysis, and
IS 3015 ( Part," ) : .994
Vl = volume in ml to which the sample hasbeen diluted.
8 PRECISION
In a single laboratory using distiUed water withadded calcium concentrations of9'0 and 36 mgflthe standard deviations were 0'3 and 0'6 mgllrespectively. Recoveries at both these levelswere 99 percent.
In an interlaboratory study with over 50 participating laboratories, Qs four waters withcalcium contents in the range 100 to 300 mglland magnesium contents from 7 to 85 mgll wereanalysed. The coefficients of variation variedfrom 3'5 to 4·6 percent for calcium and from2·9 to 6·9 magnesium.
5
IS 3025 ( Part 4' ) : 1994
Chairman
.PROP D. K. BISWAS
ANNEX A(Foreword)
COMMITTEE COMPOSITION
Environmental Protection Sectional Committee, CHD 012Representing
Central Pollution Control Board, Delhi
MembersDR K. R. RANOANATHAN ( Alternate to
Prof D. K. Biswas )ADVISER ( PHE )
AooL ADVIS.R ( PHE ) ( Alternate)SHRIS. B.C.AGARWALA
SHRI S. BALAOURUNATHAN ( Alternat« I )SHRI A. K. GUPTA ( Alternate II )
DR A. L. AOGARWAL
DR T. CHAKRABARTJ ( Alternate)DR A. ALAMSHRI S. C. AHLUWALIA
SHRI A. D. AONIHOTRI ( Alternate )
SHRI R. K. BANERJEESHRI P. K. MAIR ( Alternate)
SHRI B. BASUDR S. MUKHERJEE ( Alternate)
SHRI V. S. BHATNAGARDR M. S. N· SRINIVAS ( Alternate)
lllHRI S. CHAKRAVORTI
DR M. H. FULEICAR ( Alternat« )SHU S. DAS
SHRI M. K. PRABUUDESAI ( Alternate)DR V· S. GUPTA
SHRI D. N. p. S'NGH ( Alternate )DR HARISH CHANDRASURI B. K. JAIN
DR ( Ms ) B. SWAMINATHAN ( Alternate )SOl G. K. GURIlJA
DR A. K. WAOLB ( Alternate)So, A. LAHIRI
SHRI B. B. DAVE ( Alternat« )
DR W. MADHAVAltRISHNASHRI S. RAJAMANI (Alternate)
SHR' S. K. MAJRASHRt A. SARA (Altllrnate )
SHill R. K. MALHonASHRI S. K. JAIN ( Alternate)
SRllI A. N. KAuSor V. S. MAHAlAN (Alternat.)
DIl p. K. MATHURDIl p. M· MODAlt
PRoPH. V8lIRAWAN' ( Alternat.)SHal K. P. NYATI
SOl L. PANIlBRSELVAM ( Alternat. )Paop B. PADMANABHAMVRTHYDa T. S. PATllL
Smll C. V. RAIYANI (Alt.,nat.)Dil V.V. RAO
DIl M. ATCHAYYA ( Alt.rnat. )
Ministry of Rural Development
Bharat Heavy Electricals Ltd. Hyderabad
National Environmental Enaineerina Research Institute (CSIR).Nagpur
Indian Council of Agricultural Research, New DelhiNational Council for Cement & Building Materials , New Deihl
Shriram Institute for Industrial Research, Delhi
National Thermal Power Corporation Ltd, New Delhi
Central Scientific Instruments Organization ( CSIR). Chandigarb
Directorate General Factory Advice Service & Labour Institutes,Bombay
Indian Petrochemicals Corporation Ltd, Vadodar a
National Test House, Calcutta
Industrial Toxicology Research Centre ( CSIR ), LucknowThe Fertilizer Association of India. New Delhi
Thermax Ltd. Pune
Hindustan Lever Ltd, Bombay
Central Leather Research Institute ( CSIR ). Madras
Flakt India Ltd, Calcutta
Indian Oil Corporation Ltd ( R&D Centre ), Faridabad
Municipal Corporation or Greater Bombay
Bhabha Atomic Research Centre ( IGCAR), Kalpakkam (TN)Indian Institute of Technology, Bombay
National Productivity Council. New Delhi
Jawabarlal Nehru Univerlit:ll. New DelhiNational Institute of Occupational Health ( ICMR), Ahmadabad
Dharmsi Morarji Chemical Co Ltd, Bombay
( Continued on pap 7 )
6
( Continll!d from page 6 )
Membe"SHIll P. S. RAMANATHANSHRI D. N. V. RAO
SHil.l R. J. DUCH ( Alternate)DR S. ROUTH
DR J. C. NUHAWAN ( Alternate)SHRIP. R. SAMADDAR
~HRI P. K. SEN ( Alternate)SHRI S. C. SHARMA
SHil.l R. N. GUPTA ( Alternate)SHRI M. P. SINGH
SHil.l N. C. TIWARI ( Alternate)SHil.l M. SUBDA RAO
DR T. CHANDINI ( Alternate )SHRI R. M. SUNDARAM
SHil.l C. KRISHNA RAO ( Alternate )SHil.l SURENDER KUMAR
SHil.l R. PARTHASAaTHY (Alternate)SUPI!RINTI!ND/NO ENOINEER
EXECUTIVE ENO/NEER ( Alternate)SHil.l J. M. TULI
SHRI S. N. CHAKRABARTI ( Alternate )DR R. K. SINOH,
Director ( Chern )
IS 302S ( Part 46) : 1994
RepresentingPesticides Association of India, New DelhiTata Chemicals Ltd. Bombay
Nat ional Test House, Calcu tta
Central M.:chanical Engg Research Institute ( CSIR ). Durgapur
India Meteorological Department, New Delhi
Directorate General of Technical Development, New Delhi
Ministry of Environment & Forests
National Malaria Eradication Programme (DGHS ), Delhi
Indian Chemical Manufacturers Association, New Delhi
Panchayat Raj Department, Government of Andhra Pradesh,Hydcrabad
Er.ginecrs India Ltd, New Delhi
Director General, BIS ( Ex-officio Member)
Member Serre·tarySHRI T. R"NOASAMY
Joint uirector ( Chem ), BIS
Water Environment Subcommittee, CHD 012: 01Convener
DR Y. P. KAKAR
Members
SHil.l S. R. C. AOARWALASHa I A. K. GUPTA ( Alternate)
liHal A. BASUSHal A. K. JINDAL ( Alternate)
SURI M. S. DR/NORASHill V. G. K. NAIR (Alternate)
DR E. K. JAYANARAYANANSHRI K. K.. M ITTU ( Alternate)
;;HR I S. ISLd'SHRI F. LAL KANSAL
SHil.l S. S. SANGHA ( Alternate)SHRI D. D. KIJMTA
DR K. C. PATHAK (Alternate)PROP' K. J. NATH
PROP' A. K. ADHYA ( Alternate )DR R. NATH
Dk S. RATAN ( Alternate)DR S. R. PANOS
DR M. V. NANOTI (Alternate)DR p. M. PmRKB
DR S. R. JOSHI ( Alternate )581.' S. PRAKASH
SHil.l S. S. R"MRAK8YANI (Alternate)SHRI R. V. RAO
SHRI D· K. KAUSHIK ( Alternate)REPRBSENTAT/VBREPRESENTATIVEDR B. SBNGUPTA
DR R. C. TRIVEDI ( Alternate)SUPBIUNTI!NDINO ENOINl!IlR
EXECuTlVIi ENOINIIlR ( Alternate)SHRIS.R.TAMTA
SHil.l K. RAJAOOPALAN ( Alternate)DR p. N. VUWANATHAN
Ministry of Environment & Forests
Bharat Heavy Electricals Ltd, Hyderabad
Thermax Ltd. Pune
Shriram Institute for Industrial Research. Delhi
Mohan Meakin Ltd. Mohan Nagar
Central Pulp and Paper Research Institute, SaharanpurPunjab Pollution Control Board, Patiala
Tata Chemicals Ltd, Bombay
All India Institute of Hygiene & Public Health, Calcutta
Banaras Hindu University, Varanasi
National Environment Engineering Research Institute ( C5IR ).Nagpur
National Environment Engineering Research Institute (CSIR).Nagpur
Delhi Water Supply & Sewage Disposal Undertaking, New Delhi
Central Water Commission, Ne'W Delhi
Ministry of Rural DevelopmentU. P. Jal Nigam, LucknowCentral Pollution Control Board, Delhi
Panchayat Raj Department, Goverment of Andhra Pr_dub,Hyderabad
Central Ground Water Board. New Delhi
Industrial Toxieotoay Research Centre ( CSIR), Lucltnow
7
Bureau or Indian Standards
BIS is a statutory institution established under the Bureau ofIndian Standards Act, 1986 to promote harmoniousdevelopment of the activities of standardization, marking and quality certification of goods and attending toconnected matters in the country.
Copyright
BIS has the copyright of all its publications. No part of these publications may be reproduced in any formwithout the prior permission in writing of BIS. This does not preclude the free use, in course of implementingthe standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating tocopyright be addressed to the Director (Publications), BIS.
Review or Indian Standards
Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewedperiodically; a standard along with amendments is reaffirmed when such review indicates that no changes areneeded; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standardsshould ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of'BIS Catalogue' and 'Standards: Monthly Additions'.
This Indian Standard has been developed from Doc: No. CHD 012 (0162).
Amendments Issued Since Publication
Amendment No. Date of Issue
BUREAU OF INDIAN STANDARDS
Text Affected
Headquarten:
Manak Bhavan, 9 Bahadur Shah zafar Marg, New Delhi 110 002Telephones: 2323 0131,23233375,23239402 Website: www.bis.org.in
Regiona. Offices:
Central: Manak Bhavan, 9 Bahadur Shah zafar MargNEW DELHI 110 002
Eastern:: 1/14, C.l.T. Scheme VII M, V.l.P. Road, Kankurgachi,KOI.:.KATA 700-054 .
Northern: SCO 335-336, Sector 34-A, CHANDIGARH 160022
Southern: C.l.T. Campus, IV Cross Road, CHENNAI600 113
Western: Manakalaya, E9 MIDC, Marol, Andheri (East)MUMBAI 400 093
Telephones
{2323761723233841
{2337 8499, 2337 856123378626,23379120
{26038432609285
{2254 1216,2254 14422254 2519, 2254 2315
{2832 9295, 2832 785828327891,28327892
Bnnell.: AHMEDABAD. BANGALORE. BHOPAL. BHUBANESHWAR. COIMBATORE. FARIDABAD.GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR. LUCKNOW. NAGPUR.PARWANOO. PATNA. PUNE. RAJKOT. THIRUVANANTHAPURAM. VISAKHAPATNAM.
Printed by the Manager, Govt. of India Press. Faridabad