摘要
研究采用消化罐消解方法,应用氢化物发生-原子荧光光谱法同时进行饲料中砷、汞、硒、镉的测定,并对各种试验条件及影响因素进行了探讨。结果表明:采用HNO3-HClO4体系在消化罐内进行湿法消解,样品消解完全且所用时间短;使用HCl作为反应介质效果良好;在一定浓度范围内4种元素的浓度与荧光响应值均有良好的线性关系;4种元素的加标回收率均在90%以上;精密度(RSD,n=11)不大于1.7%。建立的方法简便、稳定可靠,检测成本低,结果满意,可用于饲料中砷、汞、硒和铅的同步检测。
To optimize the condition of digesting feed and the operation parameters of atomic fluorescence spectrophotometery, a method for the determination of As, Hg, Se and Cd in feed was developed. The feed samples were digested completly by HNO3-HClO4 in PVC bottle in short time. HCl was better reacted as acid medium. The method had a good linear range in a certain concentration. The average recoveries were more than 90% and the precision of As, Hg, Se and Cd were all lower than 1.7%. The method is suitable and practicable for the simultaneous determination of As, Hg, Se and Cd in feed with low analytical cost.
出处
《中国畜牧杂志》
CAS
北大核心
2009年第21期69-72,共4页
Chinese Journal of Animal Science
作者简介
王金荣（1970-），女，博士，副教授.通讯作者
