6533b838fe1ef96bd12a3a4f
RESEARCH PRODUCT
Analysis of toxic elements in plastic components for toys. Multi-elemental determination by x-ray fluorescence
F. Fosch ReigM.t. Doménech CarbóF. Bosch MossiV. Peris MartinezJ. V. Gimeno Adelantadosubject
Precipitation (chemistry)SodiumInorganic chemistryAnalytical chemistryX-ray fluorescencechemistry.chemical_elementBiochemistryAnalytical Chemistrylaw.inventionchemistry.chemical_compoundchemistrySodium nitratelawSodium hydroxideEnvironmental ChemistrySample preparationAtomic absorption spectroscopySpectroscopySodium diethyldithiocarbamatedescription
Abstract An x-ray fluorescence method is proposed for the multi-elemental determination of toxic elements in plastic articles for children, viz., Sb(III), Ba, Cd, Cr(III), Hg, Pb and As(III). Mineralization is achieved by using molten sodium hydroxide to decompose the organic matrix, with sodium nitrate as auxiliary oxidant. Stable solutions containing the chemical species for analysis are obtained. The species are separated from the solution by (co)precipitation, in a medium of NH+4-NH3 buffer (pH 8.5) with sodium diethyldithiocarbamate, sodium rhodizonate and Fe3+, which acts as a carrier. The precipitates deposited on filter-paper are placed in the x-ray spectrometer in fine layer morphology. The method was applied to several plastics of different characteristics, all components of children's toys. The suggested method is statistically comparable to the method that includes a reference destruction of organic matter for each element studied and subsequent determination by atomic absorption spectrometry.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-04-01 | Analytica Chimica Acta |