Determination of Dimethy Phthalate in Chinese Liquors by Linear Sweep Polarography

doi:10.7506/spkx1002-6630-201508039

Abstract

Abstract:

A method for the determination of dimethyl phthalate in Chinese liquors by linear sweep polarography was
established. The initial potential was -0.30 V ( vs. saturated calomel electrode (SCE) ) in the supporting solution consisting
of of 4.5 mL of citrate-Na2HPO4 buffer solution (pH 7.12) with sequential addition of 2.0 mL of 0.5 mol/L KCl and 6.0 mL
of 5.0 × 10-4 mol/L sodium dodecyl sulfate (SDS), and the peak potential was -1.18 V (vs. SCE) . The peak current (Ip
’’) was linearly proportional to the concentration of dimethyl phthalate in the range of 5.913–177.4 μg/mL. The limit of detection
(LOD) was 0.58 μg/mL. This method is simple, rapid and accurate. It has been appliedto analyze dimethyl phthalate in
Chinese liquors with satisfactory results.

Key words: plasticizer, dimethy phthalate, polarography, Chinese liquor

CLC Number:

O651.2

GAO Zhiyue, XUE Fei, GAO Yaling, CHEN Wen*, ZHANG Yimin. Determination of Dimethy Phthalate in Chinese Liquors by Linear Sweep Polarography[J]. FOOD SCIENCE, doi: 10.7506/spkx1002-6630-201508039.

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Determination of Dimethy Phthalate in Chinese Liquors by Linear Sweep Polarography

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