Total antimony determination in galician mussel samples (Mytilus galloprovincialis) by slurry sampling - Graphite furnace atomic absorption spectrometry. Preliminary results

Abstract

A method is proposed for the determination of antimony in mussels by slurry samplingGFAAS, using 25,0 μg mL-1 each of palladium nitrate and magnesium nitrate as the chemical modifier. The best pyrolysis and atomizauon temperatures were found to be 1300 °C and 1700 °C, respectively. Due to the matrix effects observed, the standard additions method had to be applied. The sample LOD and LOQ obtained was 16 and 56 μg kg-1, respectively. The mean analytical recovery of the method was 96.2% and the method exhibits good precision. Real mussel samples collected in the estuary Ría de Arosa, in Galicia (Northwestern Spain) were analyzed.