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紫外消解-伏安極譜法檢測葡萄酒中殘留的痕量鉑和銠元素

孫煥*，李濤，陶玲

瑞士萬通中國有限公司中心實驗室，北京，10085

Bj.sunh@metrohm.com.cn

葡萄酒中鉑和銠的主要來源為：葡萄種植中土壤和果園周圍汽車尾氣中以及生產中酒與容器、酒泵、管路接觸時從不銹鋼材質溶解出的痕量金屬。這些重金屬離子的存在，會影響葡萄酒的穩(wěn)定性和口感。經紫外消解處理后的樣品，鉑和銠元素采用吸附溶出伏安極譜儀的懸汞模式（HMDE），標準加入法檢測，鉑和銠這兩種元素的檢出限均能達到5ng/L。本研究開辟了在食品分析領域中電化學方法檢測食品中超痕量重金屬殘留的新途徑。

關鍵詞：鉑；銠；葡萄酒；伏安極譜法；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 auto 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