食品科学

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线性扫描极谱法检测白酒中邻苯二甲酸二甲酯

高志越,薛 菲,高娅玲,陈 文*,张翼民   

  1. 成都理工大学材料与化学化工学院,四川 成都 610059
  • 出版日期:2015-04-25 发布日期:2015-04-28
  • 通讯作者: 陈 文
  • 基金资助:

    国家自然科学基金面上项目(41373062)

Determination of Dimethy Phthalate in Chinese Liquors by Linear Sweep Polarography

GAO Zhiyue, XUE Fei, GAO Yaling, CHEN Wen*, ZHANG Yimin   

  1. College of Materials and Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
  • Online:2015-04-25 Published:2015-04-28
  • Contact: CHEN Wen

摘要:

邻苯二甲酸二甲酯在4.5 mL柠檬酸-Na2HPO4(pH 7.12)缓冲溶液、2.0 mL 0.5 mol/L KCl溶液、6.0 mL 5.0×10-4 mol/L十二烷基硫酸钠底液中,于起始电位-0.30 V(饱和甘汞电极(saturated calomel electrode,SCE))、峰电位(Ep)-1.18 V(vs. SCE)左右处产生一个灵敏的极谱还原波,该波的二阶导数峰电流(Ip”)与邻苯二甲酸二甲酯的质量浓度在5.913~177.4 μg/mL范围内呈良好的线性关系,检出限为0.58 μg/mL。本法操作简单、快速、准确,用于白酒中邻苯二甲酸二甲酯的测定,结果令人满意。

关键词: 塑化剂, 邻苯二甲酸二甲酯, 极谱法, 白酒

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

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