Slurry atomisation of foodstuffs in electrothermal atomic absorption spectrometry

Stephen, Sharon C.; Ottaway, J. M.; Littlejohn, David

doi:10.1007/bf02427295

Cited by 39 publications

(12 citation statements)

References 14 publications

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“…A L'Vov platform was used (18). The introduction ofoxygen during the ash stage was evaluated and rejected (19)(20)(21).…”

Section: Determination Of Arsenic In Bloodmentioning

confidence: 99%

“…A 10 1zL volume of blood was dispensed onto the L'Vov platform in the graphite tube, the capillary was automatically washed, and 10 AtL of the As standard containing 0.2% m/V nickel nitrate was deposited onto the droplet of blood (21). To determine the As content of the blood samples, matrix-matched calibration graphs were prepared using a 1:4 dilution of blood from mice treated with corn oil.…”

Section: Arsenic Assaysmentioning

confidence: 99%

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Arsenite as the Probable Active Species in the Human Carcinogenicity of Arsenic: Mouse Micronucleus Assays on Na and K Arsenite, Orpiment, and Fowler's Solution

Tinwell¹,

Stephens²,

Ashby³

1991

Environmental Health Perspectives

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Sodium arsenite, potassium arsenite, and Fowler's solution (arsenic trioxide dissolved in potassium bicarbonate) are equally active in the mouse bone marrow micronucleus assay ( 1 10 mg/kg by IPijection). The natural ore orpment (principally AS2S3) was inactive despite blood levels of arsenic of 300 to 900 ng/mL in treated mice at 24 hr. Sodium arsenite was active in three strains ofmice. It is suggested that the human lung cancer observed among arsenic ore smelters and the skin cancer among people exposed therapeutically to Fowler's solution, have, as their common origin, the genotoxic arsenite ion AsO;-. The difficulty experienced when attempting to demonstrate rodent carcinogenicity for derivatives of arsenic suggests that the bone marrow micronucleus assay may act as a useful assay for potentially carcinogenic arsenic derivatives.

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“…A L'Vov platform was used (18). The introduction ofoxygen during the ash stage was evaluated and rejected (19)(20)(21).…”

Section: Determination Of Arsenic In Bloodmentioning

confidence: 99%

Section: Arsenic Assaysmentioning

confidence: 99%

Arsenite as the Probable Active Species in the Human Carcinogenicity of Arsenic: Mouse Micronucleus Assays on Na and K Arsenite, Orpiment, and Fowler's Solution

Tinwell¹,

Stephens²,

Ashby³

1991

Environmental Health Perspectives

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“…Charring at 300°C is performed after dilution to obtain ~ 0.6% of HNO 3 . • The use of NH 4 H 2 PO 4 allows to achieve a charring temperature of 750°C without Cd losses, as reported by Stephen et al [7] and Halls et al [8]. • Mg(NO 3 ) 2 provides a low charring temperature (450°C) in contrast to that achieved by Jackson et al [9] of approximately 1000°C.…”

Section: Resultsmentioning

confidence: 65%

Cadmium analysis in soil by microwave acid digestion and graphite furnace atomic absorption spectrometry

Carlosena¹,

Prada²,

Andrade³

et al. 1996

Analytical and Bioanalytical Chemistry

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The need to determine micronutrients and toxic elements in soils has grown in recent years and cadmium is of special interest. A method has been developed for the determination of cadmium in soils based on a prior acid digestion of the samples with nitric acid in closed Teflon vessels, into a microwave over. The cadmium determination was carried out by graphite furnace atomic absorption spectrometry (GFAAS) with L'vov platform. Optimum operating conditions, analyte modifiers and matrix interferences have been investigated. The best matrix modifier was found to be ammonium dihydrogen phosphate. The interferences are greatly reduced under these operating conditions and calibration can be performed with simple aqueous solutions of the metal standard. The method is rapid and provides accurate and precise results that agree with certified values for two reference materials: BCR 141 (calcareous loam soil) and BCR 277 (estuarine sediment).

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“…Therefore, many authors [29][30][31][32] reported that when solid or slurry samples are analyzed by ETAAS, the establishment of optimal condition concerning particle diameter is essential to achieve the best reproducibility. In the studies of Nakamura et al smaller particle diameter of tooth sample [33] silicate rocks [34], and quartz [35] demonstrated the best reproducibility.…”

Section: Particle Diametermentioning

confidence: 99%

Determination of trace lead impurities in pure copper slurry samples by electrothermal atomic absorption spectrometry with molybdenum tube atomizer

et al. 2000

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Abstract.A method for direct atomization of slurry sample by electrothermal atomic absorption spectrometry (SS-ETAAS) has been developed for the determination of trace lead impurities in commercially available pure copper using laboratory-made molybdenum tube atomizer. Suitable charring temperature was set and matrix element interference was checked. Lead standard solution in the glycerol-water medium as calibration medium and ultrasonic agitation method of the suspension of the sample powder were used. Typical results of this direct slurry method and wet digestion were close and precision varies over the range RSD 3.9 to 9.0 %. The recovery of Pb added was 98-102 %. Accuracy for certified copper sample agreed within 3 % range. Limits of detection were 34 fg Pb (3S/N), and characteristic mass 170 fg Pb. The method offers rapid calibration, simplified and fast analysis of lead in pure copper at lower cost.

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Slurry atomisation of foodstuffs in electrothermal atomic absorption spectrometry

Cited by 39 publications

References 14 publications

Arsenite as the Probable Active Species in the Human Carcinogenicity of Arsenic: Mouse Micronucleus Assays on Na and K Arsenite, Orpiment, and Fowler's Solution

Arsenite as the Probable Active Species in the Human Carcinogenicity of Arsenic: Mouse Micronucleus Assays on Na and K Arsenite, Orpiment, and Fowler's Solution

Cadmium analysis in soil by microwave acid digestion and graphite furnace atomic absorption spectrometry

Determination of trace lead impurities in pure copper slurry samples by electrothermal atomic absorption spectrometry with molybdenum tube atomizer

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