Mercury(II) determination in commercial cosmetics and local Thai traditional medicines by flow injection spectrophotometry

Synopsis Objective The proposed method was developed for the enhancement of sensitivity for Hg(II) determination using dithizone by adding SDS in the presence of ascorbic acid in sulphuric acid medium. Method The method was based on the reaction between Hg(II) and 1,5-diphenylthiocarbazone (dithizon...

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Main Authors: Prasertboonyai K., Liawraungrath B., Pojanakaroon T., Liawraungrath S.
Format: Journal
Published: 2017
Online Access:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84954377897&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/42099
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-420992017-09-28T04:25:12Z Mercury(II) determination in commercial cosmetics and local Thai traditional medicines by flow injection spectrophotometry Prasertboonyai K. Liawraungrath B. Pojanakaroon T. Liawraungrath S. Synopsis Objective The proposed method was developed for the enhancement of sensitivity for Hg(II) determination using dithizone by adding SDS in the presence of ascorbic acid in sulphuric acid medium. Method The method was based on the reaction between Hg(II) and 1,5-diphenylthiocarbazone (dithizone), in the presence of sodium dodecyl sulphate (SDS) as an anionic surfactant (to avoid solvent extraction) and ascorbic acid in a slightly acidic medium resulting in a soluble orange coloured Hg(II)-dithizone complex which gave the maximum absorption at 490 nm. No extraction system was required in this method. Result Under the optimum conditions, a linear calibration graph was obtained over the concentration range of 0.05-1.50 μg mL -1 . The method was characterized by a limit of detection (LOD, defined as 3σ) and limit of quantification (LOQ, defined as 10σ) of 0.03 and 0.14 μg mL -1 , respectively. The relative standard deviations for replicate injection were 1.32 and 0.78% (n = 11) for 0.05 and 0.20 μg mL -1 of Hg(II) standard solutions, respectively. The developed method has been satisfactorily applied for Hg(II) determination in commercial cosmetics and local Thai traditional medicines. Results obtained by the proposed method are compared favourably with those analysed by ICP-MS. Conclusion Enhancement of sensitivity and rapidity for Hg(II) assay by FIA could be achieved by adding SDS in ascorbic acid. The method would be useful for routine analysis of Hg(II) in real samples. 2017-09-28T04:25:12Z 2017-09-28T04:25:12Z 2016-02-01 Journal 01425463 2-s2.0-84954377897 10.1111/ics.12259 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84954377897&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/42099
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
description Synopsis Objective The proposed method was developed for the enhancement of sensitivity for Hg(II) determination using dithizone by adding SDS in the presence of ascorbic acid in sulphuric acid medium. Method The method was based on the reaction between Hg(II) and 1,5-diphenylthiocarbazone (dithizone), in the presence of sodium dodecyl sulphate (SDS) as an anionic surfactant (to avoid solvent extraction) and ascorbic acid in a slightly acidic medium resulting in a soluble orange coloured Hg(II)-dithizone complex which gave the maximum absorption at 490 nm. No extraction system was required in this method. Result Under the optimum conditions, a linear calibration graph was obtained over the concentration range of 0.05-1.50 μg mL -1 . The method was characterized by a limit of detection (LOD, defined as 3σ) and limit of quantification (LOQ, defined as 10σ) of 0.03 and 0.14 μg mL -1 , respectively. The relative standard deviations for replicate injection were 1.32 and 0.78% (n = 11) for 0.05 and 0.20 μg mL -1 of Hg(II) standard solutions, respectively. The developed method has been satisfactorily applied for Hg(II) determination in commercial cosmetics and local Thai traditional medicines. Results obtained by the proposed method are compared favourably with those analysed by ICP-MS. Conclusion Enhancement of sensitivity and rapidity for Hg(II) assay by FIA could be achieved by adding SDS in ascorbic acid. The method would be useful for routine analysis of Hg(II) in real samples.
format Journal
author Prasertboonyai K.
Liawraungrath B.
Pojanakaroon T.
Liawraungrath S.
spellingShingle Prasertboonyai K.
Liawraungrath B.
Pojanakaroon T.
Liawraungrath S.
Mercury(II) determination in commercial cosmetics and local Thai traditional medicines by flow injection spectrophotometry
author_facet Prasertboonyai K.
Liawraungrath B.
Pojanakaroon T.
Liawraungrath S.
author_sort Prasertboonyai K.
title Mercury(II) determination in commercial cosmetics and local Thai traditional medicines by flow injection spectrophotometry
title_short Mercury(II) determination in commercial cosmetics and local Thai traditional medicines by flow injection spectrophotometry
title_full Mercury(II) determination in commercial cosmetics and local Thai traditional medicines by flow injection spectrophotometry
title_fullStr Mercury(II) determination in commercial cosmetics and local Thai traditional medicines by flow injection spectrophotometry
title_full_unstemmed Mercury(II) determination in commercial cosmetics and local Thai traditional medicines by flow injection spectrophotometry
title_sort mercury(ii) determination in commercial cosmetics and local thai traditional medicines by flow injection spectrophotometry
publishDate 2017
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84954377897&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/42099
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