Purified reagents for trace metal analysis

Moody, John R.; Beary, Ellyn S.

doi:10.1016/0039-9140(82)80241-5

Cited by 63 publications

(26 citation statements)

References 7 publications

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“…The average values from each measurement technique are shown in table 6. Values in parentheses represent the standard deviation of a single measurement.…”

Section: Results and Statistical Analysismentioning

confidence: 99%

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Development of a Standard Reference Material for Rainwater Analysis

Koch

Marinenko

Paule

1986

J. RES. NAT. BUR. STAN.

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This paper describes the development of Standard Reference Material, SRM 2694, "Simulated Rainwater," intended to aid in the analysis of acidic rainfall. Details of the formulation and preparation of the two levels of solutions (2694-1 and 2694-11) are given. The 10 analytical techniques used to measure the 12 components in the solutions are described in brief. The data used in the statistical evaluation of the results are summarized and the recommended values for pH, specific conductance, acidity, fluoride, chloride, nitrate, sulfate, sodium, potassium, ammonium, calcium, and magnesium are tabulated. The instability of ammonium ion in acidic solutions is discussed. Recommendations for the use of SRM 2694, particularly with regard to the measurement of pH, are given.

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“…The average values from each measurement technique are shown in table 6. Values in parentheses represent the standard deviation of a single measurement.…”

Section: Results and Statistical Analysismentioning

confidence: 99%

“…Seven ACS-reagent grade salts and three high-purity acids [6] were used in the preparation of the two levels of simulated rainwater. For convenience in the mixing process, stock solutions of the salts and acids were prepared.…”

Section: Mixing Of Simulated Rainwatermentioning

confidence: 99%

Development of a Standard Reference Material for Rainwater Analysis

Koch

Marinenko

Paule

1986

J. RES. NAT. BUR. STAN.

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“…Detailed information on impurities in chemical reagents has been published by Murphy [21] and Zief and Micholotti [22]. Techniques for preparing exceptionally high-purity reagents, which are especially valuable for the stabilization of trace metals in solution and for the dilution of samples, have been described by Kuehner et al [23], Mitchell [24], and Moody and Beary [25].…”

Section: Review and Discussionmentioning

confidence: 99%

The Collection and Preparation of Human-Blood Plasma or Serum for Trace-Element Analysis

Versieck¹

1986

J. RES. NAT. BUR. STAN.

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Trace element concentrations in blood plasma or serum have been assayed by numerous investigators using a variety of analytical techniques. For several elements, figures obtained in different centers are widely disparate. Impressive evidence has accumulated that a great deal of the inconsistencies should be ascribed to unsuspected contamination of the samples with exogenous material during their collection and preparation. In this paper, a number of potential sources of extraneous additions are indicated. Methods for controlling contamination are also briefly discussed.

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“…He concluded that the contamination related to the laboratory environment can be reduced by a factor of 10-100 when the analytical work is carried out in a high-class clean-air laboratory. With regard to the purification of acids, several researchers have cited the usefulness of sub-boiling distillation [19,20,21].…”

Section: Contamination Controlmentioning

confidence: 99%

Determination of ultra-trace amounts of Fe in AgNO 3 solutions by means of isotope dilution analysis applying an inductively coupled plasma mass spectrometer equipped with a dynamic reaction cell

Balcaen

Geuens

Moëns

et al. 2003

Analytical and Bioanalytical Chemistry

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The development of an ICP-MS method for the determination of ultra-trace amounts of Fe in AgNO(3) solutions using isotope dilution for calibration is described. AgNO(3) solutions are used as raw materials in the production of traditional photographic materials, and it is known that contamination with metal traces can influence the quality of the films thus produced. After adding an appropriate amount of an (54)Fe-enriched spike and permitting isotopic equilibration to take place, Ag was selectively removed from the solutions by precipitation as AgBr. Although to some extent, co-precipitation of Fe is possible under the given circumstances, an incomplete recovery of the analyte element did not affect the accuracy of the results, owing to the use of isotope dilution for calibration. NH(3) was used as a reaction gas in a quadrupole-based ICP-MS instrument, equipped with a dynamic reaction cell (DRC), providing interference-free measurement of the (54)Fe/(56)Fe ratio. The limit of detection (LOD) obtained using this procedure was approximately 0.01 micro g g(-1). This is an excellent value in comparison with the detection limit obtained with the more traditional approach: sample dilution and external calibration with a Fe standard solution (LOD ~1 micro g g(-1)). To validate the method, recovery experiments were carried out. In all instances, a quantitative recovery was established. Finally, the method was applied to the analysis of AgNO(3) solutions. A large variation in Fe concentration was observed. Depending on the Fe content in the samples, relative standard deviations typically ranged between 1 and 14%.

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Purified reagents for trace metal analysis

Cited by 63 publications

References 7 publications

Development of a Standard Reference Material for Rainwater Analysis

Development of a Standard Reference Material for Rainwater Analysis

The Collection and Preparation of Human-Blood Plasma or Serum for Trace-Element Analysis

Determination of ultra-trace amounts of Fe in AgNO 3 solutions by means of isotope dilution analysis applying an inductively coupled plasma mass spectrometer equipped with a dynamic reaction cell

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