The determination of caesium and silver in soil and fungal fruiting bodies by electrothermal atomic absorption spectrometry

P Anderson, C M Davidson, D Littlejohn, A M Ure, C A Shand, M V Cheshire

Research output: Contribution to journalArticle

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Abstract

Methods have been developed for the determination of caesium and silver in soil and fungal samples by microwave-assisted aqua regia digestion, followed by electrothermal atomic absorption spectrometry. The procedure was found to be repeatable (for soil, RSD < 5%, n = 3, at caesium and silver concentrations of 1.8 and 0.6 mg g(-1), respectively, and for fungi, RSD < 7%, n = 5, at caesium and silver levels of 20 and 1 mg g(-1), respectively) and reasonably efficient. Silver was recovered quantitatively from reference soils, but only about 80-85% of the caesium present could be extracted. Poorer caesium recoveries (< 70%) were obtained if, as part of the sample preparation procedure, solutions were taken to dryness in glass beakers prior to analysis. The detection limits were 0.02 mg Ag and 0.09 mg Cs per gram of dry soil, which are adequate for the determination of the analytes at typical environmental levels. The methods were applied in the analysis of three types of soil, a peaty podzol, a clay loam and a sandy loam and no significant matrix interferences were observed except in the determination of caesium in the sandy loam. For caesium, non-linear response curves, thought to be due to ionisation interference, were encountered using one atomic absorption spectrometer, but were not observed with the other instrument.

LanguageEnglish
Pages53-60
Number of pages8
JournalAnalytica Chimica Acta
Volume327
Issue number1
DOIs
Publication statusPublished - 20 Jun 1996

Fingerprint

Fungal Fruiting Bodies
Atomic absorption spectrometry
Cesium
cesium
fruiting
Silver
spectrometry
silver
Spectrum Analysis
Soil
Soils
soil
sandy loam
Podzol
clay loam
sample preparation
Microwaves
Fungi
Ionization
Glass

Keywords

  • Caesium
  • silver
  • soils
  • fungi
  • electrothermal atomic absorption spectrometry

Cite this

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title = "The determination of caesium and silver in soil and fungal fruiting bodies by electrothermal atomic absorption spectrometry",
abstract = "Methods have been developed for the determination of caesium and silver in soil and fungal samples by microwave-assisted aqua regia digestion, followed by electrothermal atomic absorption spectrometry. The procedure was found to be repeatable (for soil, RSD < 5{\%}, n = 3, at caesium and silver concentrations of 1.8 and 0.6 mg g(-1), respectively, and for fungi, RSD < 7{\%}, n = 5, at caesium and silver levels of 20 and 1 mg g(-1), respectively) and reasonably efficient. Silver was recovered quantitatively from reference soils, but only about 80-85{\%} of the caesium present could be extracted. Poorer caesium recoveries (< 70{\%}) were obtained if, as part of the sample preparation procedure, solutions were taken to dryness in glass beakers prior to analysis. The detection limits were 0.02 mg Ag and 0.09 mg Cs per gram of dry soil, which are adequate for the determination of the analytes at typical environmental levels. The methods were applied in the analysis of three types of soil, a peaty podzol, a clay loam and a sandy loam and no significant matrix interferences were observed except in the determination of caesium in the sandy loam. For caesium, non-linear response curves, thought to be due to ionisation interference, were encountered using one atomic absorption spectrometer, but were not observed with the other instrument.",
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The determination of caesium and silver in soil and fungal fruiting bodies by electrothermal atomic absorption spectrometry. / Anderson, P ; Davidson, C M ; Littlejohn, D ; Ure, A M ; Shand, C A ; Cheshire, M V .

In: Analytica Chimica Acta, Vol. 327, No. 1, 20.06.1996, p. 53-60.

Research output: Contribution to journalArticle

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