摘要
采用微波溶样,以盐酸铁氰化钾硼氢化钾反应体系,将标准液及食品中铅氧化为Pb4+,利用连续流动注射氢化物发生器,以15g·L-1硼氢化钾在酸性条件下产生的氢自由基,与Pb4+生成的PbH4(铅烷)气体从反应体系中逸出,导入电热石英原子化器,采用高性能空心阴极灯作光源,进行原子吸收光谱检测。方法的灵敏度为0.065μg·L-1/1%A,检出限为0.070μg·L-1,线性范围在0～14μg·L-1之间,相关系数为0.9991,RSD小于3%,加标回收率为97%。
A combination method of microwave assisted digestion-plumbane generation atomic absorption spectrometry for the determination of lead in foodstuffs was described. Plumbane was generated in a reaction system of HCl-K_3Fe(CN)_6-KBH_4 using a continuous flow injection hydride generator. The generated plumbane was atomized with a quartz tube atomizer and measured with an atomic absorption spectrometer. Sensitivity of the method was 0.065 μg·L^(-1)/1% A, and detection limit was 0.070 μg·L^(-1). Linearity was kept in range of 0^(14 μg)·L^(-1) with a correlation coefficient of 0.999 1. RSD was better than 3% with average recovery of 97%.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2005年第5期334-335,340,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
原子吸收光谱法
微波溶样
氢化物发生
铅烷
Atomic absorption spectrometry
Microwave assisted digestion
Hydride generation
Plumbane
