Quantitative Determination of Arsenate in Dried Shrimp by Spectrophotometric Measurement of its Heteropoly Blue

Charuwan Suitcharit

doi:10.4028/www.scientific.net/AMR.705.9

Paper Titles

Preface and Organizing Committees

New Mortar for Clay Masonry Structures
p.3

Quantitative Determination of Arsenate in Dried Shrimp by Spectrophotometric Measurement of its Heteropoly Blue
p.9

Inverse Problem with Integral Overdetermination for System of Equations of Kelvin-Voight Fluids
p.15

Effect of Strain Rate on Mechanical Properties of Pure Iron
p.21

Determining of Corrosion Resistance of Alloyed Earth Plateproduced by New Electro Deposition Method
p.26

Analytical Solutions Using a Higher-Order Refined Theory for the Static Analysis of Functionally Graded Material Plates
p.30

Digital Studying of Surface Groove on the Pipe Hydroforming Process in Cross Shaped Joint Production
p.36

Cross Shaped Hydroforming Process Comparing of Finite Element Methodand Practical Works
p.41

HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 705Quantitative Determination of Arsenate in Dried...

Quantitative Determination of Arsenate in Dried Shrimp by Spectrophotometric Measurement of its Heteropoly Blue

Abstract:

A cost-effective and sensitive spectrophotometric method for the determination of arsenate in dried shrimp has been developed using molybdenum blue as a chromogenic reagent. The method is based on arsenate conversion to arsenomolybdate heteropoly blue having an absorbance maximum at 870 nm. The effects of pH, time, temperature and light on its complex formation were investigated. The optimal complex formation condition at pH 4 in 90 min at 15+1°C was obtained and the blue color was favorable developed in daylight. The proposed method has been successfully applied for the determination of arsenate in samples with the addition of DTPA to eliminate the interferences resulting in increased selectivity. The standard addition calibration graph was constructed with the linear range extended to 40 μgL^-1 (r² = 0.9987). The detection limit (S/N = 3) of 3.21 μgL^-1, and the precision of 3.13% (RSD) were obtained. The method has good recovery of 95% for the determination of arsenate. The amounts of arsenate in dried shrimp samples compared with those obtained from ICP-OES were shown to be in good agreement (r = 0.998).

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Periodical:

Advanced Materials Research (Volume 705)

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9-14

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.705.9

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Online since:

June 2013

Authors:

Charuwan Suitcharit

Keywords:

Arsenate, Dried Shrimp, Heteropoly Blue, Spectrophotometric Method

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