Determination of lead and cadmium in milk with modern analytical methods.
作者： Hans J�nsson
DOI: 10.1007/BF01252667
关键词: Chemistry 、 Chromatography 、 Spectrophotometry 、 Environmental chemistry 、 Cadmium 、 Detection limit 、 Ashing 、 Liquid milk
摘要: Methods to determine lead and cadmium at the low mug/kg-level in milk were investigated. tested differential-pulse anodic-stripping voltammetry (DPASV) flameless atomic-absorption spectrophotometry (FAAS). Under circumstances which these methods used, analytical procedure based on DPASV was most sensitive, with an estimated detection limit of about 0.2 mug/1 for liquid milk. The pretreatment samples before DPASV-analysis included: freeze-drying, ashing a muffle furnance 550 degree C finally dissolution ash 0.1 M-hydrochloric acid. recoveries known amounts added 95 59%, respectively. A survey contents Swedish manket performed. This investigation showed that average content market 2.0 mug/1, standard deviation 0.5 mug/1. below all analyzed.
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