Development of Bleaching Reagent Testing by Using Mangosteen Peel Extract Solution 1.
Development of Bleaching Reagent Testing by Using Mangosteen Peel Extract Solution
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Development of Bleaching Reagent Testing by Using Mangosteen Peel Extract Solution
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MembersNathida Wiriyachoke No.2
M.4/1Chanon Pinyopawasutti No.11
M.4/1Nuttanon Jantanapornchai No.13
M.4/1
AdvisorDr. Usa Jeenjenkit 2
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Inquiry questions• How the mangosteen peel extract
solution identify the concentration of bleaching reagent ?
• Can mangosteen peel extract identify the concentration of bleaching reagent ?
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Introduction
http://www.vcharkarn.com/varticle/40332 http://www.vcharkarn.com/varticle/42442http://fic.ifrpd.ku.ac.th/fic/index.php/th/simplelist/434-fruit-28-09-2010.html
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Bleaching reagent Sodium Metabisulphite
(Na2S2O5) Sodium hydrosulfite
(NaHSO4) Sodium hypocloride (NaOCl)
http://www.palanadenterprises.com/sodium-metabisulphite.htm
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The benefit of bleaching reagentDying industry : Making new
colors Food industry : making food
more attractive
http://www.globaltextiles.com/manufacturers/offer-001005099/Others.html
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Disadvantage Frequently use of bleach
would effect to the respiratory symptoms (Zock et. al., 2009).
http://www.buzzle.com/articles/lower-abdominal-pain-and-lower-back-pain.html 7
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One out of 560 larvae treated with BW [bleach solution] (97.3% of the animals were uninfected) was recovered as an adult worm (Zanini & Graeff-Teixeira, 2001).
http://www.sciencephoto.com/images/download_lo_res.html?id=903410120 8
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Bleach causes a chemical reaction in the gill tissue which blocks the transfer of oxygen and causes the lobster to slowly asphyxiate
( T. Wilson, Vaughan, K. Wilson,Simon & Lockhart , 2007).
http://members.cox.net/jjschnebel/lobsnewb.html 9
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Scope Bleaching reagent : sodium
metabisulphite Bleaching reagent
concentration :1, 5, 50 and 100 ppm
Dilution ratio of mangosteen extract solution :1:120, 1:160 and 1:200
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Mixture ratio of bleaching reagent and mangosteen extract : 1:2
Wavelength of spectrophotometer : 410 nm
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Materials & Method
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Prepare bleaching reagent solution.
Na2S2O5 0.1 g H2O 1 liter
Na2S2O5(aq) 100 ppm
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Dilute bleach solution
Na2S2O5(aq) 5 ml 100 ppm
H2O 5 ml
Na2S2O5(aq) 50 ppm
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Mix the extract solution and different concentration of bleaching solution by 2:1 (v/v).
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Measure the absorbance by using spectrophotometer at wavelength 410 nm.
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Results1:120 of Mangosteen peel extract : water Concentra
tion of bleach
solution %T Abs Conc.
0 ppm 0.5 N/A1147.
01 ppm 2.9 1.524 745.610 ppm 4.7 1.331 651.550 ppm 6.0 1.225 600.3
100 ppm 6.7 1.178 574.317
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1:160 of Mangosteen peel extract : water (First time)
Concentration
of bleach
solution %T Abs Conc.
0 ppm 0.4 N/A N/A1 ppm 2.2 1.651 809.610 ppm 8.7 1.072 516.450 ppm 7.1 1.001 491.8
100 ppm 8.4 1.072 530.3
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1:160 of Mangosteen peel extract : water ( Second time)
Concentration
of bleach solutio
n %T Abs Conc.
0 ppm 1.3 1.865 916.9
1 ppm 5.9 1.229 601.9
10 ppm 6.4 1.195 585.4
50 ppm 6.5 1.187 582.5100 ppm 6.6 1.178 577.3
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1:200 of Mangosteen peel extract : water
Concentration
of bleach solutio
n %T Abs Conc.
0 ppm 3.4 1.469 718.2
1 ppm 10.4 0.983 482.0
10 ppm 10.9 0.964 471.6
50 ppm 12.0 0.922 451.5100 ppm 12.7 0.898 439.6
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The effect of bleach solution with mangosteen extract
Concentration of bleach solution (ppm)
Absorbance value
0 20 40 60 80 100 12000.20.40.60.8
11.21.41.61.8
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1:120 1:160 (1) 1:160 (2) 1:20021
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Conclusion
Mangosteen peel extract solution can identify the concentration of bleaching reagent.
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Discussion The color of mangosteen
extract solutions were clearer when we put the bleaching solutions.
The higher concentration of bleaching solutions the lower absorbance.
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0 ppm
1 ppm10 ppm
50 ppm
100 ppm
Picture shown the mixture of bleach solution and mangosteen peel extract
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The plots of all ratios between mangosteen extract solution and bleaching solution have the same trend.
We use the absorbance value for drawing graph instead of the others because it is normally use.
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Benefit We can use mangosteen extract
solution to identify the concentration of bleach reagent by natural substance.
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Future research Testing other kinds of bleach
reagent such as sodium hydrosulphite instead of sodium metabisulphite.
Develop paper testing for bleaching reagent like Garnier paper.
http://poohkiesplace.blogspot.com/2010/08/moisturizers-with-sunscreens.html
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ReferencesWilson, D. T., Vaughan, D., Wilson, S. K., Simon, C. N. &
Lockhart, K. ( April 2008). Efficacy of a starch-iodine swab technique to detect the illegal use of bleach in a Spiny Lobster (Panulirus argus) fishery. Fisheries Research. Volume 90, Issues 1-3, Pages 86-91. Retrieved from http://www.sciencedirect.com.ejournal.mahidol.ac.th/science/article/pii/S0165783607002494.
Zanini, G.M., & Teixeira, C. G.(15 January 2001). Inactivation of infective larvae of Angiostrongylus costaricensis with short time incubations in 1.5% bleach solution, vinegar or saturated cooking salt solution. Acta Tropic. Volume 78, Issue 1, Pages 17-21.Retrieved from http://www.sciencedirect.com.ejournal.mahidol.ac.th/science/article/pii/S0001706X00001650
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Zock, J.P. et. al. (October 2009). Domestic use of hypochlorite bleach, atopic sensitization, and respiratory symptoms in adults. Journal of Allergy and Clinical Immunology. Volume 124, Issus 4, Page 731-738. Retrieved from http://www.sciencedirect.com.ejournal.mahidol.ac.th/science/article/pii/S0091674909008744
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Acknowledgements Dr. Usa Jeenjenkit and our
SINOS teachers Chemistry Department and
Biology Department of Mahidol Wittayanusorn School
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Thank youfor your attention
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