Determination of silver in silicate rocks by furnace atomic absorption spectrometry

Eames, John C.; Matoušek, J.P.

doi:10.1021/ac50058a021

Cited by 28 publications

(7 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If these criteria are fulfilled then simple aqueous calibration may be used and precision of analytical results can be attained. 14 Calibrations using reference materials, 15 conventional standard additions, 16 internal standards, 17 as well as empirical correction factors, 18 have been used to compensate for different transportation and excitation properties. The methods are, however, limited in their application.…”

Section: Introductionmentioning

confidence: 99%

Multielement analysis of tea leaves by inductively coupled plasma optical emission spectrometry using slurry nebulisation

Mokgalaka

McCrindle

Botha

2004

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

In order to evaluate the slurry nebulization method as an alternative method for the analysis of tea, the metal ion content of tea samples of different origins was determined. The concentrations of six elements, Al, Ba, Ca, Mg, Mn and Zn, were determined by introducing tea as a slurry into an inductively coupled plasma optical emission spectrometer (ICP-OES). Calibration was performed by using either aqueous standard solutions or by using the simplified generalized standard additions method (GSAM). The simplified GSAM is an expansion of the conventional standard additions method, based on the principle of varying both the sample mass and the amount of standard solution added. Initially the tea was ground for 3 h prior to slurry preparation. A carbonization procedure was included before the sample was ground. The grinding time was reduced to only 30 min. For comparison, tea was also digested by boiling in acid and being introduced into the plasma as an aqueous solution. The results obtained using slurry analysis were much higher than the results obtained from digested tea using aqueous standards for calibration. The metal content of the tea samples was found to be suitable for differentiating amongst the tea samples studied. The accuracy of the method was checked by analyzing a tea certified reference material. The Student's t-test showed that values obtained using slurry nebulization were close to the certified values at a 95% confidence level. The simplified GSAM was applied to further confirm the accuracy of the slurry technique, and the values obtained using this method were comparable with those obtained using the slurry method with aqueous calibration. The slurry method can, therefore, be successfully applied to the analysis of tea leaves without the need to predissolve them. This could avoid the use of hazardous chemicals, incomplete dissolution and loss of volatile analytes.

show abstract

Section: Introductionmentioning

confidence: 99%

Multielement analysis of tea leaves by inductively coupled plasma optical emission spectrometry using slurry nebulisation

Mokgalaka

McCrindle

Botha

2004

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

show abstract

“…If compared with other metals, relatively few studies involving silver in electrothermal atomizers are described in the literature. 4,15,16,[37][38][39][40][41][42] A study was performed in order to find the appropriate furnace parameters and to evaluate the behavior of the analyte in the graphite furnace in the absence of chemical modifiers, as well as in the presence of chemical modifiers. Ruthenium as a permanent modifier and Pd-Mg nitrate modifier were compared.…”

Section: Furnace Parameters and Chemical Modification Studymentioning

confidence: 99%

Comparative study of electrothermal atomic absorption spectrometric methods for the determination of silver in used lubricating oils

Aucélio

Curtius

2000

Analyst

View full text Add to dashboard Cite

“…Eames and Matousek proposed a new standard additions method for AAS, in which the same volume of standard aqueous solution was added to various accurately known weights of solid sample. 20 Atsuya et al proposed a three-point estimation standard additions method for the analysis of biological materials by solid sampling AAS. 21 For more accurate determination, Boonen et al demonstrated a kind of standard additions method named simpli®ed generalizing standard addition method.…”

Section: Optimisation Of Operating Conditionsmentioning

confidence: 99%

Furnace-fusion system for the direct determination of cadmium in biological samples by inductively coupled plasma atomic emission spectrometry using tungsten boat furnace–sample cuvette technique

Okamoto¹

1999

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

A solid sampling technique using an electrothermal vaporisation device is described. To a small sample cuvette made of tungsten, a solid mixture of a biological sample and diammonium hydrogenphosphate powder as a fusion ¯ux was added. The cuvette was superposed on a tungsten boat furnace, then tetramethylammonium hydroxide solution was injected as a sample decomposition reagent. By resistance heating of the tungsten boat furnace, the cuvette temperature was maintained at a wet-digestion temperature suf®cient to decompose the solid sample. After the on-furnace digestion was complete, the temperature was successively elevated up to maximum to generate analyte vapour. The transient cloud of vapour was introduced into the plasma. Since any solid samples could be decomposed to ash completely on the cuvette, the sensitivity was the same as that of aqueous standards. The method was successfully applied to the direct determination of cadmium in biological certi®ed reference materials.

show abstract

Determination of silver in silicate rocks by furnace atomic absorption spectrometry

Cited by 28 publications

References 14 publications

Multielement analysis of tea leaves by inductively coupled plasma optical emission spectrometry using slurry nebulisation

Multielement analysis of tea leaves by inductively coupled plasma optical emission spectrometry using slurry nebulisation

Comparative study of electrothermal atomic absorption spectrometric methods for the determination of silver in used lubricating oils

Furnace-fusion system for the direct determination of cadmium in biological samples by inductively coupled plasma atomic emission spectrometry using tungsten boat furnace–sample cuvette technique

Contact Info

Product

Resources

About