微波消解-原子荧光光谱法测定香精中的汞  

Determination of mercury in essence with atomic fluorescence spectrometry aftermicrowave digestion

作　　者：乌尼尔[1] 高娃[1] 其其格[1] 赵源[1] 胡桂林[1] 姜瑞青 常建军[1] 李梅[1] 

机构地区：[1]内蒙古蒙牛乳业集团股份有限公司,内蒙古呼和浩特011500

出　　处：《中国酿造》2010年第8期142-144,共3页China Brewing

摘　　要：建立了用氢化物原子荧光法测定香精中的重金属汞，考察了前处理方法和原子荧光仪器对实验结果的影响，最后确定了消解试剂为3：2的硝酸和双氧水，微波消解最高温度为180℃，消解时间为25min；原子荧光的还原剂为15g／L的硼氢化钾，载流液为5％的盐酸。用以上最优化条件对反应香精进行测定，得到汞的检出限为0．0093μg／L，相对标准偏差为1．5％，回收率范围为93％-104％。Method for determination of heavy metals mercury using hydride generation atomic fluorescence spectrometry was established. Effects of pre-treatment methods and atomic fluorescence instruments on final results were studied. The optimum conditions were as follows： digest samples with nitric acid and hydrogen peroxide with ratios by 3：2, digest samples with microwave under maximum temperature at 180℃ for 25 min; analyse digested sample with reducing agent of potassium borohydride by 15 g/L and with carrier liquid of 5% hydrochloric acid. Detection limit of mercury was 0.0093 μg/L, the relative standard deviation at 1.5% and the recovery ranged in 93-104% under the optimum conditions.

关 键 词：微波消解 原子荧光 汞 香精 

分 类 号：O657.31[理学—分析化学]