紫外消解-伏安極譜法檢測(cè)葡萄酒中殘留的痕量鉑和銠元素

紫外消解-伏安極譜法檢測(cè)葡萄酒中殘留的痕量鉑和銠元素

孫煥*，李濤，陶玲

瑞士萬(wàn)通中國(guó)有限公司中心實(shí)驗(yàn)室，北京，10085

Bj.sunh@metrohm.com.cn

葡萄酒中鉑和銠的主要來(lái)源為：葡萄種植中土壤和果園周圍汽車尾氣中以及生產(chǎn)中酒與容器、酒泵、管路接觸時(shí)從不銹鋼材質(zhì)溶解出的痕量金屬。這些重金屬離子的存在，會(huì)影響葡萄酒的穩(wěn)定性和口感。經(jīng)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(biāo)準(zhǔn)加入法檢測(cè)，鉑和銠這兩種元素的檢出限均能達(dá)到5ng/L。本研究開(kāi)辟了在食品分析領(lǐng)域中電化學(xué)方法檢測(cè)食品中超痕量重金屬殘留的新途徑。

關(guān)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