Bovine liver sample preparation and micro-homogeneity study for Cd and Pb determination by solid sampling electrothermal atomic absorption spectrometry

[摘要] This work describes a systematic study for bovine liver sample preparation for Cd and Pb determination by solid sampling electrothermal atomic absorption spectrometry. Samples were prepared using different procedures: (1) drying in a household microwave oven followed by drying in a stove at 60 ÂºC until constant mass, and (2) freeze-drying. Ball and cryogenic mills were used for grinding. Particle size, sample size and micro sample homogeneity were investigated. All prepared samples showed good homogeneity (He < 10) even for low sample mass, but samples dried in a microwave oven/stove and ground in a ball mill presented the best homogeneity.

[学科分类] 化学（综合）

[关键词] solid sampling atomic absorption;homogeneity;bovine liver