“Cold Vapor” Method for Determining Mercury

Kopp, John F.; Longbottom, Mary C.; Lobring, Lorry B.

doi:10.1002/j.1551-8833.1972.tb02624.x

Cited by 43 publications

(12 citation statements)

References 10 publications

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“…About 50 mg of dry weight of cells were digested with 2 ml of HNO 3 at 85 o C for 3 hours (Cha & Cooksey 1991). Accumulation of Hg 2+ in the cells was determined by Mercury Vaporation Unit (Kopp et al 1972).…”

Section: Bacterial Strains and Growth Mediummentioning

confidence: 99%

A Study on Mercury-Resistant Bacteria Isolated from a Gold Mine in Pongkor Village, Bogor, Indonesia

Irawati

Patrícia

Soraya

et al. 2012

HAYATI Journal of Biosciences

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Mercury is one of the major pollutant in the environment which is highly toxic. Bioremediation strategies using bacteria have been proposed as an attractive alternative because this is effective, less expensive and more efficient to remove mercury. Brevundimonas sp. HgP1 and Brevundimonas sp. HgP2 were two highly mercury resistant bacteria isolated from a gold mine in Pongkor village with MIC of 575 ppm. The purposes of the research were to study the effect of mercury on bacterial growth and morphological changes of bacterial colony and to measure the ability of bacterial isolates to accumulate Hg 2+ . The growth was monitored by measuring optical density at 600 nm, whereas accumulation of Hg 2+ was measured by mercury vaporation unit. This present studies revealed that the addition of 50 and 100 ppm HgCl 2 in Brevundimonas sp. HgP1 resulted in the decreasing of growth rate and the elongation of lag phase in 8 and 16 hours, respectively. The addition of HgCl 2 also affected morphological appearance of the bacterial colony to black. Brevundimonas sp. HgP1 accumulated Hg 2+ up to 1.09 and 2.7 mg/g dry weight of cells and removed 64.38 and 57.10% Hg 2+ from the medium containing 50 and 100 ppm HgCl 2 , respectively.

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Section: Bacterial Strains and Growth Mediummentioning

confidence: 99%

A Study on Mercury-Resistant Bacteria Isolated from a Gold Mine in Pongkor Village, Bogor, Indonesia

Irawati

Patrícia

Soraya

et al. 2012

HAYATI Journal of Biosciences

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“…The organic mercury was oxidize to inorganic mercury before to analysis by potassium permanganate, sulfuric acid and nitric acid solution as recommended by Buck scientific instruction. [27][28][29] The flow of the sample through the column was adjusted with a Leybold vacuum pump model PJ7721-035.3.…”

Section: Methodsmentioning

confidence: 99%

“…The inorganic mercury in the eluent was directly measured by CVAAS. The total mercury was determined after the oxidation of metylmercury into the inorganic mercury with potassium permanganate, sulfuric/nitric acid solution according to the accepted procedure [27][28][29] as follows: 2.5 mL of concentrate sulfuric acid, 1.5 mL of concentrate nitric acid and 7.5 mL of 5% potassium permanganate solution were added to the eluent. After 15 min, 5 mL of 5% peroxydisulfate was added and the solution was heated for 2 hrs at 90 o C over a water bath.…”

Section: Methodsmentioning

confidence: 99%

Prenconcentration and Determination of Mercury (II) and Methylmercury in Waters by Immobilized 1,5-Diphenylcarbazone and Cold Vapor Atomic Absorption Spectrometry

2002

Bulletin of the Korean Chemical Society

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1,5-diphenylcarbazone was immobilized on sodium dodecyl sulfate coated alumina. The alumina particle was effectively used for collection of mercury (II) and methylmercury cations at sub-ppb level. The adsorbed mercury was eluted with 1 mol L −1 of hydrobromic acid solution. The mercury (II) was then directly measured by cold vapor atomic absorption spectrometry utilizing tin (II) chloride where as the total mercury was determined after the oxidation of methylmercury into the inorganic mercury. The methylmercury concentration was calculated by the difference between th e value of total mercury and mercury (II). Mercury (II) and methylmercury cations were completely recovered from water with a preconcentration factor of 100 (for 1 L solution). Relative standard deviation at Hg L µg L −1 level 1.7% (n = 8) and the limit of detection was 0.11 µg L −1. The procedure was applied to spring water, well water and seawater and accuracy was assessed through recovery experiments.

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“…Furthermore, 100 ml of a solution containing 250 ng of CH 3 HgCl was passed through the membrane disk and after elution with 5 ml of ethanol; the eluent was irradiated with electron beam (5 kGy) and was analyzed according to the given procedure. For comparison, the methyl mercury in another eluents was oxidized to inorganic mercury by the accepted procedure of potassium permanganate and potassium persulfate in acidic media [30][31][32], and at 95% confidence limit the results of both study was the same.…”

Section: Conversion Of Methyl Mercury To Inorganic Mercurymentioning

confidence: 99%

Preconcentration, speciation and determination of ultra trace amounts of mercury by modified octadecyl silica membrane disk/electron beam irradiation and cold vapor atomic absorption spectrometry

Ashkenani

Dadfarnia

Shabani

et al. 2009

Journal of Hazardous Materials

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“Cold Vapor” Method for Determining Mercury

Cited by 43 publications

References 10 publications

A Study on Mercury-Resistant Bacteria Isolated from a Gold Mine in Pongkor Village, Bogor, Indonesia

A Study on Mercury-Resistant Bacteria Isolated from a Gold Mine in Pongkor Village, Bogor, Indonesia

Prenconcentration and Determination of Mercury (II) and Methylmercury in Waters by Immobilized 1,5-Diphenylcarbazone and Cold Vapor Atomic Absorption Spectrometry

Preconcentration, speciation and determination of ultra trace amounts of mercury by modified octadecyl silica membrane disk/electron beam irradiation and cold vapor atomic absorption spectrometry

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