Microwave digestion of biological samples with acid mixture in a closed double PTFE vessel for metal determination by “one-drop” flame atomic absorption spectrometry
✍ Scribed by I. Kojima; A. Kato; C. Iida
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 474 KB
- Volume
- 264
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
A microwave-heat system usmg a closed double PTFE vessel with a polypropylene Jacket was evaluated for raptd sample preparation for the determmatlon of trace elements m blologlcal samples The nucrowave-asslsted dIgestIon was based on sample dlssolutlon with a HNO,-HClO,-HCl-HF mixture The sunultaneous dIgestIon of SIX samples mcludmg one blank was completed wlthm 15 mm even with very mdd heatmg The presence of an alkahne solution between the PTFE vessels was very effectwe m aldmg the dlgestlon and absorption of evolved acid gases SIX metals (Ca, Cu, Fe, Mg, Mn and Zn) m standard reference materials,, NIST-SRM 1577 Bovme Ltver, NIES-CRM No 1 Pepperbush, No 6 Mussel, No 5 Human Hair, No 7 Tea Leaves and No 9 Sargasso, were analysed by "one-drop" flame atonuc absorption spectrometry Good agreement of the analytIca results with the certified values was obtamed