摘要
目的建立原子荧光光谱同时测定玉米中砷和锡的测定方法。方法微波消解消化样品,优化实验并选择仪器的最佳测定条件,同时测定砷和锡。结果砷的线性范围为0～40μg/L,相关系数为0.9998,检出限为0.050μg/kg,加标回收率为99.0%～102.8%;锡的线性范围为0～200μg/L,相关系数为0.9994,检出限为0.32μg/kg,加标回收率为91.8%～101.4%。结论该方法具有较高灵敏度、准确度、精密度和较低的检出限,能够满足样品中砷和锡同时测定的要求,省时、省力。
[ Objective] To establish atomic fluorescence spectrometry, and determine Arsenic and Stannum in cooked corns by microwave digestion simultaneously. [ Methods] After digesting samples with microwave, Arsenic and Stannum were determined under optimum conditions of instruments. [ Results] Linear range of Arsenic was 0 -40 μg/L, correlation coefficient was 0. 9998, lower limit of detection was 0.050 μg/kg, the recovery of standard addition was 99.0% -102.8% ; linear range of Stannum was 0 -200 μg/L, correlation coefficient was 0. 9994, lower limit of detection was 0.32 μg/kg, the recovery of standard addition was 91.8% 101.4%. [ Conclusion] This method has high sensitivity, accuracy, precision and lower limits of detection, can satisfy the requirement of determination of Arsenic and Stannum simultaneously with less time and effort.
出处
《职业与健康》
CAS
2009年第12期1261-1262,共2页
Occupation and Health
关键词
原子荧光光谱法
微波消解
砷和锡
Atomic fluorescence spectrometry
Microwave digestion
Arsenic and Stannum
