摘要
用氢化物原子荧光光度法测定虾粉中总砷含量时，对干法灰化、湿法消解、微波消解3种样品处理方法对虾粉中砷元素测定结果的影响进行了比较。通过试验确定了最佳消解条件。砷元素浓度在0—10ug／L的范围内与荧光强度呈线性关系，线性相关系数r=0．9996，检出限为0．2ug/L。比对结果表明，干法灰化适合于测定虾粉中总砷的含量，湿法消解测定总砷的含量偏低，微波消解不适合测定虾粉中总砷的含量。采用干法灰化-氢化物原子荧光光度法测定虾粉中总砷含量，加标回收率为76．2％～106．0％。
Different pretreatment methods such as dry ashing, wet digestion, microwave digestion were discussed for the de- termination of total arsenic in shrimp powder. The best digestion conditions were confirmed. Concentration of total arsenic was linear with fluorescence intensity in the range of 0 - 10 ug/L. The results showed that dry ashing was more suitable for determination of total arsenic in shrimp powder. The result obtained by using wet digestion was lower than the actual content. Microwave digestion was not suitable for determination of total arsenic in shrimp powder. The recoveries of dry ashing - hydride generation atomic fluorescence method was 76.2% - 106.0%.
出处
《化学分析计量》
CAS
2010年第2期42-44,共3页
Chemical Analysis And Meterage
关键词
虾粉
干法灰化
砷
原子荧光光度计
shrimp powder, dry ashing, arsenic, atomic fluorescence spectrometer
