Development of a method for the direct determination of arsenate in honey by hydride generation atomic absorption spectrometry

摘要

This paper describes the development of a fast method for determination of arsenate in samples of honey. The variables studied in the optimization of the method were NaBH4 concentration, pre-reducing agent, HCl concentration, the diluent type and contact time with the sample. The optimized conditions were 50 g L?1 of sample prepared in 1.3 mol L?1 HCl and 10 g L?1 SC(NH2)2. The hydride generation solutions were 8.5 g L?1 NaBH4 and 2.5 mol L?1 HCl. The limit of detection (LOD) was 20 ng g?1. The validated method was used to quantify arsenate in 27 samples of honey collected from different cities of Minas Gerais state, Brazil. All samples showed arsenate concentrations below the LOD...