摘要
目的建立一种快速测定褐藻酸钠中微量铅的方法。方法湿法消解样品，用荧光分光光度计测定。结果测定铅的捡出限为2．71×10^-2μg·mL^-1，测定3种褐藻酸钠中铅的含量，相对标准差（RSD）分别为4．06％、1．57％、2．12％，平均回收率在88．32~100．8％之间。结论该法具有操作简便、准确、灵敏、重复性好等优点，可用于褐藻酸钠中铅含量的测定。
Objective To establish a method for determination of trace lead in alginate sodium. Method The lead in the samples was determined by fluorescence spectroscopy after been digested by hydrothermal decomposition. Results The detection limit of lead was 2.71 × 10^-2μg · mL^-1. The relative standard deviation of the three samples were 4. 06%, 1. 57% and 2.12% respectively, the average recovery was 88. 32% ~ 100.8%. Conclusion The method had the advantages of simple operation, higher precision, higher sensitivity and repeatability and was suitable for the determination of trace lead in the alginate sodium.
出处
《中国海洋药物》
CAS
CSCD
2007年第5期34-37,共4页
Chinese Journal of Marine Drugs
基金
教育部科学技术重点项目(106106)
关键词
荧光分光光度法
褐藻酸钠
铅
fluorescence spectroscopy
alginate sodium
lead
