紫外消解-伏安极谱法检测葡萄酒中残留的痕量铂和铑元素

紫外消解-伏安极谱法检测葡萄酒中残留的痕量铂和铑元素

孙焕*，李涛，陶玲

瑞士万通中国有限公司中心实验室，北京，10085

Bj.sunh@metrohm.com.cn

葡萄酒中铂和铑的主要来源为：葡萄种植中土壤和果园周围汽车尾气中以及生产中酒与容器、酒泵、管路接触时从不锈钢材质溶解出的痕量金属。这些重金属离子的存在，会影响葡萄酒的稳定性和口感。经紫外消解处理后的样品，铂和铑元素采用吸附溶出伏安极谱仪的悬汞模式（HMDE），标准加入法检测，铂和铑这两种元素的检出限均能达到5ng/L。本研究开辟了在食品分析领域中电化学方法检测食品中超痕量重金属残留的新途径。

关键词：铂；铑；葡萄酒；伏安极谱法；紫外消解

Determination of Ultra-trace Pt and Rh in wine after UV digestion by Voltammetric polarography

Huan Sun*, Tao Li, Ling Tao

Cclab of Metrohm Chian, Beijing, 10085

Bj.sunh@metrohm.com.cn

These heavy metallic elements such as Pt and Rh mainly come from the soil and the automobile exhaust during planting , the metal in containers, wine pump, and pipes during wine manufacturing. Pt and Rh can influence the stability and taste of wine. After UV digestion, Ultra-trace Pt and Rh were determined with adsorptive stripping voltammetry (AdSV) at HMDE. The minimum detectable quantity of  Pt and Rh reach 5 ng/L both via standard addition method. We find a new electrochemical approach to determine Ultra-trace Pt and Rh in food analysis field.

Key words：Pt , Rh, wine, VA, UV digestion