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4 rezultatima
The effect of experimental parameters on the cold-vapor mercury atomic absorption determination. Speciation analysis of sulfhydryl-bound mercury.
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Prijava Registriraj se
Two schools of thought have dominated the reduction procedure in cold-vapor atomic absorption: acidic reduction following the method of Hatch and Ott (4), and alkaline reduction as devised by Magos and Cernik (5). Our study investigates the effect of cysteine added to both mercury stock solutions
Methylmercury analyses in biological materials by heating vaporization atomic absorption spectrometry.
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Prijava Registriraj se
To develop an analytical method for methylmercury (MeHg) compounds in biological samples (hair, blood, fish) with reproducibly high recovery of MeHg using heating vaporization atomic absorption spectrometry, we examined the pretreatment process of biological samples such as solubilization,
Modified determination of total and inorganic mercury in urine by cold vapor atomic absorption sectrometry.
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Prijava Registriraj se
In this procedure a single-beam spectrophotometer is used without background correction. By the method of Magos [Analyst (London) 96, 847 (1971)] mercury in undigested urine is complexed to L-cysteine in acid solution. At high pH and in the presence of stannous ions, mercury ions are reduced to
Factors affecting the determination of total mercury in biological samples by continuous-flow cold vapor atomic absorption spectrophotometry.
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The acidic reduction of Hg using a continuous-flow analytical system was evaluated. With 25% SnCl2 as the reductant, characteristic concentrations (sensitivities) of 0.44 microgram/L (open cell) and 0.29 microgram/L (flow-through cell) were obtained using inorganic Hg2+ standards in 1.5% HCl. When
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