Applications of Atomic Absorption Spectrometry to Trace Metal Analyses of Toxicological Materials

Berman, Eleanor

doi:10.1016/b978-0-12-536504-8.50010-x

Cited by 5 publications

(2 citation statements)

References 21 publications

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“…In most instances, the sample is limited so that as much information as possible must be obtained from the amount available. Atomic absorption spectrophotometry was chosen as the preferred method because of its more general availability (4) compared to other methods (5)(6)(7) and its speed and sensitivity.…”

Section: Discussionmentioning

confidence: 99%

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Analysis of sulfation plates

See¹,

Salomon²

1974

Anal. Chem.

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temperature range up to 490 °C, but it is probable that the life period of the furnace might be shortened to some extent.A corollary to the destruction of the organic matrix at such lower temperatures is the possibility of determining comparatively volatile elements such as lead in organic compounds at lower levels with higher accuracy.Some studies were also made to complete destruction of the organic matrix by addition, in the graphite tube, of some selected oxidizing agents such as HCIO4, HNO3, H2O2 or some suitable combination of these such as HCIO4-HNO3 in the proportions of 1:2 v/v. But two disadvantages were experienced: (i) the graphite furnace was attacked and (ii) it was difficult to avoid contamination of copper from the reagents employed at such low levels.

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Section: Discussionmentioning

confidence: 99%

“…EXPERIMENTAL Apparatus and Reagents. Since large numbers of sulfation plates are required for routine monitoring, sulfation plates are prepared in our laboratory (4). Sulfa Ver III pillows are supplied by Corning Laboratories Inc.…”

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confidence: 99%

Analysis of sulfation plates

See¹,

Salomon²

1974

Anal. Chem.

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Minamata disease

et al. 1973

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Determination of cadmium, lead, thallium, and nickel in blood by atomic absorption spectrometry

Amore¹

1974

Anal. Chem.

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sulfate should be a constant factor, provided the sample volume and the pH during measurement are kept constant. A brief study of the solubility of barium sulfate in solutions of varying acidity was made to determine its solubility in the 0.005IV hydrochloric acid used in this analysis. The results are given in Table V. The solubility was found to be about 600 µg barium sulfate in 100 ml of 0.005N hydrochloric acid. In the sulfation plate analysis, the 20-ml aliquot may contain up to 120 µg dissolved barium sulfate (50 µg sulfate). Thus, in every analysis, 50 µg sulfate may be lost due to barium sulfate dissolving in the solution. If the standards are run at the same pH as the samples, the dissolved barium sulfate will be compensated for and the observed results will be correct. This contrasts with the standard method (3) where there may be a discrepancy of up to 30 µg sulfate between samples and standards, since only 20 µg sulfate are soluble in 20 ml deionized water at pH 6(6).Any changes in the results of the analysis of a specific sample due to standing for a period of time were studied using a standard solution of sodium sulfate (25 µg/ml) in 0.005ÍV hydrochloric acid. Twenty-ml samples of the stock solution were read at 15-minute intervals for 3 hours. The results indicated a loss of 5-7% of measurable sulfate. Samples should, therefore, be analyzed on the same day as acidification is made.(6) "Handbook of Chemistry and Physics," Chemical Rubber PublishingCo., New York, N.Y., 1970, p B-91.

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Applications of Atomic Absorption Spectrometry to Trace Metal Analyses of Toxicological Materials

Cited by 5 publications

References 21 publications

Analysis of sulfation plates

Analysis of sulfation plates

Minamata disease

Determination of cadmium, lead, thallium, and nickel in blood by atomic absorption spectrometry

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