Determination of Mercury in Food Products and Biological Fluids by Aeration and Flameless Atomic Absorption Spectrophotometry

Thorpe, Virginia A

doi:10.1093/jaoac/54.1.206

Cited by 19 publications

(4 citation statements)

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“…Analyses. Flameless atomic absorption spectrophotometry was used for quantitative measurements of mercuric ion (18,32). The method is based on reduction of Hg2+ to vapor (Hg0) by SnCl2 in presence of H2SO4; the Hg0 is then flushed by N2 through a gas flow-through cell and mounted in a Shimadtzu recording spectrophotometer (MPS-50L), and absorbance at 253.7 nm was measured.…”

Section: Methodsmentioning

confidence: 99%

Formation of Methyl Mercury by Bacteria

Hamdy¹,

Noyes²

1975

Applied Microbiology

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Twenty-three Hg2+-resistant cultures were isolated from sediment of the Savannah River in Georgia; of these, 14 were gram-negative short rods belonging to the genera Escherichia and Enterobacter, six were gram-positive cocci (three Staphylococcus sp. and three Streptococcus sp.) and three were Bacillus sp. All the Escherichia, Enterobacter, and the Bacillus strain were more resistant to Hg2+ than the strains of staphylococci and streptococci. Adaptation using serial dilutions and concentration gradient agar plate techniques showed that it was possible to select a Hg2+-resistant strain from a parent culture identified as

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Section: Methodsmentioning

confidence: 99%

Formation of Methyl Mercury by Bacteria

Hamdy¹,

Noyes²

1975

Applied Microbiology

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“…The technique involved concentrating the mercury on copper wire by electrolysis, followed by analysis using flameless atomic absorption. Thorpe (308) recommended a simple method in which the sample was digested with H2S04-RMn04, reduced with SnCl2, and a 10-ml sample of the headspace vapor, drawn by syringe, transferred to a spectrophotometer cell for atomic absorption. Munns and Holland (220) reported results of a collaborative study for the determination of mercury in fish.…”

Section: Metallic Elementsmentioning

confidence: 99%

Organic elemental analysis

S.¹,

Gutterson²

1974

Anal. Chem.

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This review follows the previous one (189) and covers the literature and information received by the authors from October 1971 to November 1973. As in the past, it surveys the developments in the determination of the elements in organic materials.Since the commercial CHN analyzers have been on the market for some ten years (186), time is come for an overall evaluation of these automated machines. At the International Symposium on Microtechniques held in University Park, Pa. in August 1973, several practicing microanalysts reported on the performance of the respective apparatus which they had used for long periods. The findings are favorable. At the same time, it is noted that the number of commercial instruments (187, 188) has diminished. Research activities on automation, however, have been vigorous, as evidenced by the papers on coulometric methods, use of ion-selective electrodes, and other elec-

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“…[23][24][25][26][27][28][29][30][31]. The adaptation of the Hatch and Ott apparatus shown in Figure3performed satisfactorily and was described in the acid digestion procedure.…”

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confidence: 99%