微波消化-连续流动进样冷原子吸收法测定中成药中痕量汞

Microwave Diestion Continual Flow Ingection Cold Atom Absorption to Determine Trace Hg in Traditional Chinese Medicine Drug

本实验室建立了用微波消化系统，消化中成药样品，用连续流动进样冷原子吸收法测定了中成药中痕量汞的方法。研究了硝酸－过氧化氢和硝酸－硫酸－高氯酸两种不同混合酸的消化体系及消化时间和压力对测定结果的影响。方法的相对标准偏差为４．９％，回收率在９１％—１１６％之间，检出限为０．１５ｎｇ／ｍＬ。

This experiment established a method of digesting traditional Chinese medicine drug with microwave sample preparation system and using continual flow injection cold atom absorption to determine trace Hg in traditional Chinese medicine drug.The method studied the influence of two different mixed acid digestion systems(HNO 3 H 2O 2 and HNO 3 HClO 4 H 2SO 4) and the influence of digestion time and pressure.The detection limit is 0.15ng/mL,recoveries are between 91%—116%,RSD is 4.9%.