电感耦合等离子体质谱法检测白酒中28种元素

Application of Inductively Coupled Plasma Mass Spectrometry(ICP-MS) for Determination of 28 Trace Elements in Chinese Liquor

建立白酒中微量元素的分析方法。采用10mL混酸（硝酸一高氯酸（4：1，V/V）作为消解液消解白酒样品，电感耦合等离子体质谱法OCP—MS）检测白酒中Ag、Cd、Cs、Ba、Li、Be、Na、Mg、A1、K、Ca、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、Ga、As、Se、T1、Pb、Bi、U、Rb和Sr28种元素。结果表明，该方法具有前处理操作简单，分析速度快（1min内检N28种元素）、动态线性范围宽（21种元素线性范围为0-300μg／L，7种元素线性范围为0-30mg／L）、精密度高、准确度好、检出限低等特点，且各元素的回收率均在85．19％～104，01％之间，所有RSD小于4．7％。本实验建立的方法完全可以满足白酒中28种元素的分析要求。

This paper describes a simple method for the determination of 28 micro-elements including Ag, Cd, Cs, Ba, Li, Be, Na, Mg, AI, K, Ca, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, As, Se, TI, Pb, Bi, U, Rb, and Sr in Chinese liquor by using inductively coupled plasma mass spectrometry （ICP-MS）. For digestion of samples, 10 mL of a mixture of HNO3 with HC104 （4：1, V/V） was used. The results revealed that the method had some advantages, such as simple sample pretreatment, fast analysis, low detection limit, high precision and accuracy, and wide linear dynamic range （0-300 ktg/L for 21 of these micro-elements, 0-30 ktg/L for the rest）. The recovery rates for all the micro-elements were between 85.19% and 104.01% with RSD less than 4.7%. This method can completely meet the requirements for determination of the 28 micro-elements in Chinese liquor.