[Determination of Cadmium in Shrimp and Shell Fish Samples by Coprecipitation Enrichment with Mn(Ⅱ)-5-Br-PADAP Flame Atomic Absorption Spectrometry].

A separation/preconcentration procedure with coprecipitation has been proposed for the flame atomic absorption spectrometric (FAAS) determination of cadmium at trace level in food and environmental samples. Manganese(Ⅱ) was used as a carrier which chelated with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol to detect the content of trace cadmium in shrimp and shell fish samples with flame atomic absorption spectrometry for the first time. The precipitate could be easily dissolved with concentrated nitric acid.