Evaluation of a method for determination of total antimony, arsenic and tin in foodstuffs using measurement by atomic-absorption spectrophotometry with atomisation in a silica tube using the hydride generation technique

Abstract

A method is described for the determination of antimony, arsenic and tin in foodstuffs in which organic matter is destroyed using a wet-oxidation procedure, except for arsenic in samples of marine origin in which organic matter is destroyed by the dry-ashing technique. Each element is obtained in the highest valency state and converted into the respective normal hydride with sodium tetrahydroborate( 111) , prior to atomisation in a flame-heated silica tube and atomic-absorption spectrophotometric measurement. The optimum conditions for this procedure are discussed and direct and indirect interference effects are described. The accuracy of the procedure is assessed for each element, and where possible the accuracy of the method in application is considered, Standard deviations of the results for levels normally found in foodstuffs have been calculated and derived limits of detection and confidence intervals are given.

Ultratrace Speciation and Biogenesis of Methyltin Transport Species in Estuarine Waters

“…We expect that not only the dissolved and particulate organics and Cl influence formation of Sn-H bonds, but that other aquated metal ions play an important role, too. Several workers have reported that, for example, As(III), As(V), Cu(II), Co(II), Ni(II), Hg(II), Pb(II), and Ag(I) interfere by unknown means at low concentrations [10,59]. Several of these metals are commonly found in the polluted Baltimore Harbor waters (see table 1), and their presence may explain, in part, our results.…”

Dietary tin intake and association with canned food consumption in Japanese preschool children

“…In winter in 1984-1985, Smart et al [27] studied 24-27-month-old children UK and observed that Sn intake was 1.16 mg/day (1.16) as GM (geometric standard deviation; GSD). The method employed for analysis was flame atomic absorption spectrometry [28], the high values observed in the study of Smart et al [27] might be attributable to the difference in the method of analyses i.e., flame atomic absorption spectrometry (Smart et al [27] ) versus inductively coupled plasma-mass spectrometry (the present study). It should also be noted that no information on canned food consumption was given unfortunately.…”

Flow Injection Hydride Generation Atomic Absorption Spectrometry for Determination of Arsenic in Water and Biological Samples from Arsenic-Affected Districts of West Bengal, India, and Bangladesh

“…The oxidation potential of the HNO 3 -H 2 SO 4 -HClO 4 combination is high enough to decompose organic matter completely at temperatures about Ͻ200°C (54,55). Biological samples such as blood, urine (56), and marine organisms (32,57) require vigorous oxidation and the presence of HClO 4 is essential. Decomposition of many biological substances by HNO 3 alone under pressure in Teflon vessels at temperatures up to 160°C has been found to be incomplete (58).…”