Proficiency Testing Final Report Report No. 002 - …cosqc.gov.iq/Files/Chemical Analysis of...

Proficiency Testing Report

COSQC Laboratory Accreditation

Department

Date: 05/05/2015 F28. Ver01

Proficiency Testing Final Report

Report No. 002

Chemical Analysis of Portland Cement

(Portland Cement 02-2015)

Issue date: 12 July 2015

Prepared by Approved by Ban I. Nawrooz Elham H. Al-Ahmed PT coordinator Head of IQAS

of 28 Report No. 002

IQAS PT section

Table of Contents

1- Introduction …..………………………………………………………….. 3 1.1 Proficiency Testing ………………………………………………….. 3 1.2 Confidentiality …..…………………………………………………... 3

2- Participated Laboratories ……………………………………………...…. 4

3- Test Material ……………………………………………………………... 4 3.1 Preparation …………………..………………………………….…….. 4 3.2 Homogeneity ……………….………………………………………..... 4 3.3 Dispatch ………………………..……………………………………... 4 3.4 Test Method ……………………………………………………………5

4- Statistical Evaluation of Results ……………………………………...……5

4.1 Assigned Value ………………………………………………………...5 4.2 Z-score …………………...………………………………………….... 5

5- Summary of Results …………………………………………………..….. 6

6- References …………………………………………………………………7

7- Contact Information ………………………………………………………..7

Appendix (A) ………………………………………………………………8 Appendix (B) ………………………………………………………………13 Appendix (C) …………………………………………………...………….21


IQAS PT section

1- Introduction 1.1 Proficiency Testing:

Proficiency testing programs are statistical quality assurance programs that enable

laboratories to assess their performance in conducting test methods within their own

laboratories when their data are compared against other laboratories that participate

worldwide in the same program.

Proficiency testing aim is to provide an independent assessment of the competence of

participating laboratories. Together with the use of validated methods, Proficiency

testing is an essential element of laboratory quality assurance.

The IQAS PT programs are independent schemes arranged by an independent section

in IQAS; designed for laboratories to ensure the performance of individual laboratories

for specific tests or measurements, and to monitor the continuing performance of

laboratories. It provides laboratories with an objective means of assessing the

reliability and confidence in the data they are producing. It also complies with the

requirements of ISO/IEC 17025:2005: 5.9 – Assuring the quality of test and calibration

results – clause (b) “participation in inter-laboratory comparison or proficiency

testing programs”.

Further details of the IQAS proficiency testing scheme are available in our (PC03.

Ver01) and (W02. Ver01).

1.2 Confidentiality:

In order to ensure confidentiality, a unique laboratory reference code is assigned to


IQAS PT section

each participant. All participants receive a report including all the results for that PT;

but without identifying individual laboratories.

2- Participated laboratories:

There was a positive response from the laboratories that were invited to participate in

this round. The test sample was distributed to twenty laboratories from eight of Iraqi

governorates; seventeen of the laboratories reported their results within the set time-

frame.

3- Test Material

3.1 Preparation:

Samples for this round were prepared by a subcontractor; the preparation of

samples was according to (EN 196-7, 2007). Sample had been putted in sealed

plastic bottles,

3.2 Homogeneity:

In order to check that the samples to be used in a proficiency test are adequately

homogeneous and stable; randomly selected samples were tested in duplicate in a

subcontracting accredited laboratory. This laboratory meets the requirements of the

standard ISO/IEC 17043-1:2010. The homogeneity was checked according to the

requirement of ISO 13528-2005. These data showed a sufficient homogeneity.

3.3. Dispatch:

One plastic bottle contains 20 gm of ordinary Portland cement was distributed to all


IQAS PT section

participated laboratories. The start date was 7 April 2015.

Test materials were distributed to twenty participants; most of them collected the

test materials during the time frame; others were a little bit late.

3.4 Test Method:

Work instructions no. (W02. Ver01) were given to the participants to test the

samples for determination of: Silicon dioxide, Aluminum oxide, Ferrous oxide,

Calcium oxide, Magnesium oxide, Insoluble residue, Sulfur trioxide and Loss of

Ignition as per: ASTM C113-14

4- Statistical evaluation of results:

4.1 Assigned value:

The results submitted by participants were statistically analyzed in order to provide

an assigned value for Eight major elements namely Silicon dioxide, Aluminum

oxide, Ferrous oxide, Calcium oxide, Magnesium oxide, Insoluble residue, Sulfur

trioxide and Loss of Ignition.

The assigned value was derived from the consensus of the results submitted by all

participants. Values from participants that were way out from the others are down-

weighted so that their impact is not big according to the statistical method of ISO

13528/5725-5 (Algorithm A+S).

Assigned value and measurements uncertainty are shown in table (1), appendix (A). However the uncertainty of the assigned value will be negligible when it is not too large.


IQAS PT section

4.2 Z-score:

Results were evaluated by using Z-score value which is a standardized measure of

laboratory bias, calculated using the assigned value and the standard deviation for

proficiency assessment.

푍 − 푠푐표푟푒 =(X − Xa)Ơƿ

Where:

X= the result reported by the participant Xa= the assigned value σp= the standard deviation for proficiency assessment

The basic performance categories and reporting formats to be used are as follows: Score Interpretation |Z| < 2.00 Satisfactory results 2.00 < |Z| < 3.00 Questionable results |Z| > 3.00 Unsatisfactory results All results will be given a performance score. For the purposes of performance assessment for a single round Z- score is interpreted as shown above. 5- Summary of Results:

The results have been analyzed by using the ProLab plus Software which is specifically designed for planning, organizing, performing and analyzing of inter-laboratory tests and proficiency schemes.

87.4% of data points are satisfactory (lie between a Z-score of -2 and +2)

2.52% of data points are Questionable (lie between a Z- score of -2 to -3 and +2 to +3)

10.08% of data points are Unsatisfactory and a (Z-score of below -3 and above +3)


IQAS PT section

Of the (119) results received; (12) were shown to be unsatisfactory.

The test results submitted by the participated laboratories and Z-scores are presented in the Appendixes.

6- References: - ISO/IEC 17025:2005, General requirements for the competence of testing and

calibration laboratories

- ISO/IEC 17043:2010, Conformity assessment , General requirements for

proficiency testing

- ISO 13528:2005, Statistical methods for use in proficiency testing by inter-

laboratory comparisons Accrediting Conformity Assessment Bodies

- (PC03. Ver01), Proficiency Testing (PT) policy

(W02. Ver01), Work Instructions for Proficiency testing of (Ordinary Portland Cement OPC) Chemical tests

7- Contact Details:

Ban I. NAWROOZ

PT Section \ IQAS \ IRAQ

E-mail: [email protected] , [email protected]


IQAS PT section

Appendix (A)

Table no 1

Table no 2

Labs Results and Z-scores

Z-ScoreLab ResultsMeasurandSample OutlierLaboratory

CEMENT SIO2 LC01 20.661 1.025CEMENT SIO2 LC02CEMENT SIO2 LC03 14.900 E-6.784CEMENT SIO2 LC04 19.900 0.128CEMENT SIO2 LC05 20.090 0.355CEMENT SIO2 LC06 18.000 E-2.269CEMENT SIO2 LC07 20.020 0.272CEMENT SIO2 LC08 20.040 0.296CEMENT SIO2 LC09 20.460 0.791CEMENT SIO2 LC10 20.010 0.260CEMENT SIO2 LC11 19.160 -0.777CEMENT SIO2 LC12 20.000 0.248CEMENT SIO2 LC14 16.920 E-3.747CEMENT SIO2 LC15 20.380 0.698CEMENT SIO2 LC16 20.580 0.931CEMENT SIO2 LC17 20.020 0.272CEMENT AL2O3 LC01 4.902 -0.168CEMENT AL2O3 LC02CEMENT AL2O3 LC03 5.900 0.953CEMENT AL2O3 LC04CEMENT AL2O3 LC05 5.210 0.201CEMENT AL2O3 LC06 7.080 E2.056CEMENT AL2O3 LC07 5.860 0.912CEMENT AL2O3 LC08 4.350 -0.891CEMENT AL2O3 LC09 5.120 0.095CEMENT AL2O3 LC10 4.110 -1.234CEMENT AL2O3 LC11 5.640 0.680CEMENT AL2O3 LC14 1.070 E-9.374CEMENT AL2O3 LC15 5.120 0.095CEMENT AL2O3 LC16 4.860 -0.220CEMENT AL2O3 LC17 4.700 -0.423CEMENT CAO LC01 63.116 0.819CEMENT CAO LC02CEMENT CAO LC03 53.800 E-4.834CEMENT CAO LC04CEMENT CAO LC05 62.580 0.517CEMENT CAO LC06 16.000 E-47.762CEMENT CAO LC07 62.290 0.353CEMENT CAO LC08 63.020 0.765CEMENT CAO LC09 62.110 0.250CEMENT CAO LC10 62.950 0.726CEMENT CAO LC11 62.920 0.709CEMENT CAO LC12 60.000 -0.973CEMENT CAO LC14CEMENT CAO LC15 63.000 0.754CEMENT CAO LC16 61.360 -0.180

Pt SectionIQAS

Page 1 Page 1 Page 1

Table no 3



CEMENT CAO LC17 60.400 -0.738CEMENT MGO LC01 2.201 -0.301CEMENT MGO LC02 4.600 E5.974CEMENT MGO LC03 2.300 0.073CEMENT MGO LC04CEMENT MGO LC05 2.210 -0.267CEMENT MGO LC06 0.340 E-16.203CEMENT MGO LC07 2.190 -0.344CEMENT MGO LC08 2.290 0.036CEMENT MGO LC09 2.110 -0.661CEMENT MGO LC10 2.260 -0.076CEMENT MGO LC11 2.690 1.407CEMENT MGO LC14CEMENT MGO LC15 2.320 0.147CEMENT MGO LC16 2.570 1.018CEMENT MGO LC17 2.020 -1.032CEMENT INSOLUBL LC01 1.320 0.407CEMENT INSOLUBL LC02 1.900 1.363CEMENT INSOLUBL LC03 10.250 E5.785CEMENT INSOLUBL LC04CEMENT INSOLUBL LC05 0.730 -1.147CEMENT INSOLUBL LC06 1.220 0.201CEMENT INSOLUBL LC07 1.220 0.201CEMENT INSOLUBL LC08 1.040 -0.218CEMENT INSOLUBL LC09 1.040 -0.218CEMENT INSOLUBL LC10 0.990 -0.347CEMENT INSOLUBL LC11 1.080 -0.119CEMENT INSOLUBL LC12 1.857 1.303CEMENT INSOLUBL LC13 0.900 -0.597CEMENT INSOLUBL LC14 1.460 0.672CEMENT INSOLUBL LC15 0.670 -1.372CEMENT INSOLUBL LC16 0.780 -0.973CEMENT INSOLUBL LC17 0.880 -0.656CEMENT SO3 LC01 2.338 -0.246CEMENT SO3 LC02 2.170 -1.164CEMENT SO3 LC03 3.200 E3.618CEMENT SO3 LC04CEMENT SO3 LC05 2.480 0.480CEMENT SO3 LC06 2.350 -0.183CEMENT SO3 LC07 2.600 1.062CEMENT SO3 LC08 2.200 -0.995CEMENT SO3 LC09 2.440 0.280CEMENT SO3 LC10 2.210 -0.939CEMENT SO3 LC11 2.170 -1.164CEMENT SO3 LC12 2.744 1.725CEMENT SO3 LC13 2.400 0.077CEMENT SO3 LC14 2.530 0.726CEMENT SO3 LC15 2.400 0.077CEMENT SO3 LC16 2.298 -0.458


Pt SectionIQAS of 28 Report No. 002


CEMENT SO3 LC17 2.280 -0.555CEMENT LOSS LC01 3.770 0.149CEMENT LOSS LC02 4.200 1.338CEMENT LOSS LC03 4.500 E2.098CEMENT LOSS LC04CEMENT LOSS LC05 3.740 0.061CEMENT LOSS LC06 4.070 0.992CEMENT LOSS LC07 3.940 0.635CEMENT LOSS LC08 3.550 -0.513CEMENT LOSS LC09 3.670 -0.147CEMENT LOSS LC10 3.540 -0.544CEMENT LOSS LC11 3.540 -0.544CEMENT LOSS LC12 0.682 E-18.677CEMENT LOSS LC13 3.560 -0.482CEMENT LOSS LC14 3.940 0.635CEMENT LOSS LC15 3.470 -0.764CEMENT LOSS LC16 3.310 -1.284CEMENT LOSS LC17 3.880 0.466CEMENT FE2O3 LC01CEMENT FE2O3 LC02CEMENT FE2O3 LC03 4.700 E4.206CEMENT FE2O3 LC04CEMENT FE2O3 LC05 2.890 -0.548CEMENT FE2O3 LC06 2.800 -0.857CEMENT FE2O3 LC07 3.000 -0.182CEMENT FE2O3 LC08 3.070 0.043CEMENT FE2O3 LC09 2.960 -0.314CEMENT FE2O3 LC10 3.040 -0.053CEMENT FE2O3 LC11 3.000 -0.182CEMENT FE2O3 LC13 5.000 E4.811CEMENT FE2O3 LC14 3.330 0.838CEMENT FE2O3 LC15 2.960 -0.314CEMENT FE2O3 LC16 2.640 -1.432CEMENT FE2O3 LC17



Summary of outliers

Z scoreLab resultMeasurandSample OutlierLaboratory Number

CEMENT SIO2 LC03 14.900 E-6.7841CEMENT SIO2 LC14 16.920 E-3.7471CEMENT SIO2 LC06 18.000 E-2.2691CEMENT SIO2 LC02 E0CEMENT AL2O3 LC14 1.070 E-9.3741CEMENT AL2O3 LC06 7.080 E2.0561CEMENT AL2O3 LC02 E0CEMENT CAO LC03 53.800 E-4.8341CEMENT CAO LC06 16.000 E-47.7621CEMENT CAO LC02 E0CEMENT MGO LC06 0.340 E-16.2031CEMENT MGO LC02 4.600 E5.9741CEMENT INSOLUBL LC03 10.250 E5.7851CEMENT SO3 LC03 3.200 E3.6181CEMENT LOSS LC03 4.500 E2.0981CEMENT LOSS LC12 0.682 E-18.6771CEMENT FE2O3 LC13 5.000 E4.8111CEMENT FE2O3 LC03 4.700 E4.2061CEMENT FE2O3 LC02 E0CEMENT FE2O3 LC01 E0

Outlier type A: laboratories w ith a single outlierOutlier type B: deviant laboratory meanOutlier type C: excessive laboratory standard deviationOutlier type E: score outside tolerance limits



Table no 4

PROLab Plus

Laboratory

LC03

LC14

LC06

LC11

LC04

LC12

LC10

LC07

LC17

LC08

LC05

LC15

LC09

LC16

LC01

Z-S

core

3

2

1

0

-1

-2

-3

-4

-5

-6

-7

Limit of tolerance

Limit of tolerance

E E E

Summary results for SiO2

Sample: Assigned value:

Measurand:

Method:

Number of shown laboratories:

Rel. target s.d.:

Range of tolerance:

Rel. repeatability s.d.:

Cement

SIO2

ISO 5725-5 (Alg. A+S) log

15

19.79 % (Empirical value)

4.19% (Empirical value)

not available

18.20 - 21.52 % (|Z-Score| <= 2.000)

Z-ScoreLab ResultLaboratory

LC01 20.661 1.025

LC02 0.000

LC03 14.900 -6.784

LC04 19.900 0.128

LC05 20.090 0.355

LC06 18.000 -2.269

LC07 20.020 0.272

LC08 20.040 0.296

LC09 20.460 0.791

LC10 20.010 0.260

LC11 19.160 -0.777

LC12 20.000 0.248

LC14 16.920 -3.747

LC15 20.380 0.698

LC16 20.580 0.931

LC17 20.020 0.272

Pt SectionIQAS

PROLab Plus

Laboratory

LC03

LC14

LC06

LC11

LC04

LC12

LC10

LC07

LC17

LC08

LC05

LC15

LC09

LC16

LC01

Z-S

core

3

2

1

0

-1

-2

-3

-4

-5

-6

-7

Limit of tolerance

Limit of tolerance

E E E

Fig no 1

Appendix (B)


PROLab Plus

Laboratory

LC14

LC10

LC08

LC17

LC16

LC01

LC09

LC15

LC05

LC11

LC07

LC03

LC06

Z-S

core

2

0

-2

-4

-6

-8

-10

Limit of tolerance

Limit of tolerance

E

E

Summary results for Al2O3


Measurand:

Method:


Rel. target s.d.:

Range of tolerance:


Cement

AL2O3


13



not available

3.62 - 7.02 % (|Z-Score| <= 2.000)


LC01 4.902 -0.168

LC02 0.000

LC03 5.900 0.953

LC04 0.000

LC05 5.210 0.201

LC06 7.080 2.056

LC07 5.860 0.912

LC08 4.350 -0.891

LC09 5.120 0.095

LC10 4.110 -1.234

LC11 5.640 0.680

LC14 1.070 -9.374

LC15 5.120 0.095

LC16 4.860 -0.220

LC17 4.700 -0.423

Pt SectionIQAS

PROLab Plus

Laboratory

LC14

LC10

LC08

LC17

LC16

LC01

LC09

LC15

LC05

LC11

LC07

LC03

LC06

Z-S

core

2

0

-2

-4

-6

-8

-10

Limit of tolerance

Limit of tolerance

E

E

Fig no 2


PROLab Plus

Laboratory

LC06

LC03

LC12

LC17

LC16

LC09

LC07

LC05

LC11

LC10

LC15

LC08

LC01

Z-S

core

3

2

1

0

-1

-2

-3

-4

-5

Limit of tolerance

Limit of tolerance

E E

Summary results for CaO


Measurand:

Method:


Rel. target s.d.:

Range of tolerance:


Cement

CAO


13



not available

58.28 - 65.26 % (|Z-Score| <= 2.000)


LC01 63.116 0.819

LC02 0.000

LC03 53.800 -4.834

LC04 0.000

LC05 62.580 0.517

LC06 16.000 -47.762

LC07 62.290 0.353

LC08 63.020 0.765

LC09 62.110 0.250

LC10 62.950 0.726

LC11 62.920 0.709

LC12 60.000 -0.973

LC14 0.000

LC15 63.000 0.754

LC16 61.360 -0.180

LC17 60.400 -0.738

Pt SectionIQAS

PROLab Plus

Laboratory

LC06

LC03

LC12

LC17

LC16

LC09

LC07

LC05

LC11

LC10

LC15

LC08

LC01

Z-S

core

3

2

1

0

-1

-2

-3

-4

-5

Limit of tolerance

Limit of tolerance

E E

Fig no 3


PROLab Plus

Laboratory

LC06

LC17

LC09

LC07

LC01

LC05

LC10

LC08

LC03

LC15

LC16

LC11

LC02

Z-S

core

5.0

2.5

0.0

-2.5

-5.0

-7.5

-10.0

-12.5

-15.0

Limit of toleranceLimit of tolerance

E

E

Summary results for MgO


Measurand:

Method:


Rel. target s.d.:

Range of tolerance:


Cement

MGO


13



not available

1.80 - 2.88 % (|Z-Score| <= 2.000)


LC01 2.201 -0.301

LC02 4.600 5.974

LC03 2.300 0.073

LC04 0.000

LC05 2.210 -0.267

LC06 0.340 -16.203

LC07 2.190 -0.344

LC08 2.290 0.036

LC09 2.110 -0.661

LC10 2.260 -0.076

LC11 2.690 1.407

LC14 0.000

LC15 2.320 0.147

LC16 2.570 1.018

LC17 2.020 -1.032

Pt SectionIQAS

PROLab Plus

Laboratory

LC06

LC17

LC09

LC07

LC01

LC05

LC10

LC08

LC03

LC15

LC16

LC11

LC02

Z-S

core

5.0

2.5

0.0

-2.5

-5.0

-7.5

-10.0

-12.5

-15.0


E

E

Fig no 4


PROLab Plus

Laboratory

LC15

LC05

LC16

LC17

LC13

LC10

LC08

LC09

LC11

LC06

LC07

LC01

LC14

LC12

LC02

LC03

Z-S

core

6

5

4

3

2

1

0

-1

-2

-3

Limit of tolerance

Limit of tolerance

E

Summary results for Insoluble Residue


Measurand:

Method:


Rel. target s.d.:

Range of tolerance:


Cement

Insoluble Residue


16



not available

0.53 - 2.42 % (|Z-Score| <= 2.000)


LC01 1.320 0.407

LC02 1.900 1.363

LC03 10.250 5.785

LC04 0.000

LC05 0.730 -1.147

LC06 1.220 0.201

LC07 1.220 0.201

LC08 1.040 -0.218

LC09 1.040 -0.218

LC10 0.990 -0.347

LC11 1.080 -0.119

LC12 1.857 1.303

LC13 0.900 -0.597

LC14 1.460 0.672

LC15 0.670 -1.372

LC16 0.780 -0.973

LC17 0.880 -0.656

Pt SectionIQAS

PROLab Plus

Laboratory

LC15

LC05

LC16

LC17

LC13

LC10

LC08

LC09

LC11

LC06

LC07

LC01

LC14

LC12

LC02

LC03

Z-S

core

6

5

4

3

2

1

0

-1

-2

-3

Limit of tolerance

Limit of tolerance

E

Fig no 5


PROLab Plus

Laboratory

LC02

LC11

LC08

LC10

LC17

LC16

LC01

LC06

LC13

LC15

LC09

LC05

LC14

LC07

LC12

LC03

Z-S

core

4

3

2

1

0

-1

-2

-3

Limit of tolerance

Limit of tolerance

E

Summary results for So3


Measurand:

Method:


Rel. target s.d.:

Range of tolerance:


Cement

SO3


16



not available

2.03 - 2.81 % (|Z-Score| <= 2.000)


LC01 2.338 -0.246

LC02 2.170 -1.164

LC03 3.200 3.618

LC04 0.000

LC05 2.480 0.480

LC06 2.350 -0.183

LC07 2.600 1.062

LC08 2.200 -0.995

LC09 2.440 0.280

LC10 2.210 -0.939

LC11 2.170 -1.164

LC12 2.744 1.725

LC13 2.400 0.077

LC14 2.530 0.726

LC15 2.400 0.077

LC16 2.298 -0.458

LC17 2.280 -0.555

Pt SectionIQAS

PROLab Plus

Laboratory

LC02

LC11

LC08

LC10

LC17

LC16

LC01

LC06

LC13

LC15

LC09

LC05

LC14

LC07

LC12

LC03

Z-S

core

4

3

2

1

0

-1

-2

-3

Limit of tolerance

Limit of tolerance

E

Fig no 6


PROLab Plus

Laboratory

LC12

LC16

LC15

LC10

LC11

LC08

LC13

LC09

LC05

LC01

LC17

LC07

LC14

LC06

LC02

LC03

Z-S

core

2.5

0.0

-2.5

-5.0

-7.5

-10.0

-12.5

-15.0

-17.5


E

E

Summary results for Loss of Ignition


Measurand:

Method:


Rel. target s.d.:

Range of tolerance:


Cement

Loss of Ignition


16



not available

3.10 - 4.46 % (|Z-Score| <= 2.000)


LC01 3.770 0.149

LC02 4.200 1.338

LC03 4.500 2.098

LC04 0.000

LC05 3.740 0.061

LC06 4.070 0.992

LC07 3.940 0.635

LC08 3.550 -0.513

LC09 3.670 -0.147

LC10 3.540 -0.544

LC11 3.540 -0.544

LC12 0.682 -18.677

LC13 3.560 -0.482

LC14 3.940 0.635

LC15 3.470 -0.764

LC16 3.310 -1.284

LC17 3.880 0.466

Pt SectionIQAS

PROLab Plus

Laboratory

LC12

LC16

LC15

LC10

LC11

LC08

LC13

LC09

LC05

LC01

LC17

LC07

LC14

LC06

LC02

LC03

Z-S

core

2.5

0.0

-2.5

-5.0

-7.5

-10.0

-12.5

-15.0

-17.5


E

E

Fig no 7


PROLab Plus

Laboratory

LC16

LC06

LC05

LC09

LC15

LC07

LC11

LC10

LC08

LC14

LC03

LC13

Z-S

core

5

4

3

2

1

0

-1

-2

-3

Limit of tolerance

Limit of tolerance

EE

Summary results for Fe2O3


Measurand:

Method:


Rel. target s.d.:

Range of tolerance:


Cement

FE2O3


12



not available

2.49 - 3.75 % (|Z-Score| <= 2.000)


LC01 0.000

LC02 0.000

LC03 4.700 4.206

LC04 0.000

LC05 2.890 -0.548

LC06 2.800 -0.857

LC07 3.000 -0.182

LC08 3.070 0.043

LC09 2.960 -0.314

LC10 3.040 -0.053

LC11 3.000 -0.182

LC13 5.000 4.811

LC14 3.330 0.838

LC15 2.960 -0.314

LC16 2.640 -1.432

LC17 0.000

Pt SectionIQAS

PROLab Plus

Laboratory

LC16

LC06

LC05

LC09

LC15

LC07

LC11

LC10

LC08

LC14

LC03

LC13

Z-S

core

5

4

3

2

1

0

-1

-2

-3

Limit of tolerance

Limit of tolerance

EE

Fig no 8


Histogram of scores

Sample:

Measurand:

Cement

SIO2

Z-Score3210-1-2-3-4-5-6

Rel

. fre

quen

cy

0.50

0.45

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0.00

Pt SectionIQAS

Fig no 1

Appendix (C)


Histogram of scores

Sample:

Measurand:

Cement

AL2O3

Z-Score210-1-2-3-4-5-6-7-8-9

Rel

. fre

quen

cy

0.275

0.250

0.225

0.200

0.175

0.150

0.125

0.100

0.075

0.050

0.025

0.000

Pt SectionIQAS

Fig no 2


Histogram of scores

Sample:

Measurand:

Cement

CAO

Z-Score0-5-10-15-20-25-30-35-40-45

Rel

. fre

quen

cy

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0.00

Pt SectionIQAS

Fig no 3


Histogram of scores

Sample:

Measurand:

Cement

MGO

Z-Score6420-2-4-6-8-10-12-14-16

Rel

. fre

quen

cy

0.40

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0.00

Pt SectionIQAS

Fig no 4


Histogram of scores

Sample:

Measurand:

Cement

Insoluble Residue

Z-Score543210-1-2

Rel

. fre

quen

cy

0.250

0.225

0.200

0.175

0.150

0.125

0.100

0.075

0.050

0.025

0.000

Pt SectionIQAS

Fig no 5


Histogram of scores

Sample:

Measurand:

Cement

SO3

Z-Score3.532.521.510.50-0.5-1-1.5-2-2.5-3

Rel

. fre

quen

cy

0.250

0.225

0.200

0.175

0.150

0.125

0.100

0.075

0.050

0.025

0.000

Pt SectionIQAS

Fig no 6


Histogram of scores

Sample:

Measurand:

Cement

Loss of Ignition

Z-Score20-2-4-6-8-10-12-14-16-18

Rel

. fre

quen

cy

0.35

0.30

0.25

0.20

0.15

0.10

0.05

0.00

Pt SectionIQAS

Fig no 7


Histogram of scores

Sample:

Measurand:

Cement

FE2O3

Z-Score543210-1-2

Rel

. fre

quen

cy

0.5

0.4

0.3

0.2

0.1

0.0

Pt SectionIQAS

Fig no 8


Proficiency Testing Final Report Report No. 002 - …cosqc.gov.iq/Files/Chemical Analysis of...

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