Preconcentration method for electrothermal atomic absorption spectrometric analysis for heavy metals in Antarctic snow at sub ng kg−1 levels
✍ Scribed by E.D. Suttie; E.W. Wolff
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 708 KB
- Volume
- 258
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
An Improved techrnque for concentratmg heavy metals onto the surface of tungsten wres, prior to analysis by electrothermal atomic absorption spectrometry, is reported Ultraclean methods and materials,, described here, have enabled Improvements m detectlon hmlts to be reahsed W~tb the new procedure, detectlon lusts of 001 ng Cd kg-', 0 47 ng Cu kg-', 0 22 ng Pb kg-' and 0 24 ng Zn kg-' are obtamed These are low enough to allow analysis of ancient and modem AntarctIc snow, except perhaps for cadmmm A comparison with samples InJected directly mto tbe graphite furnace shows good agreement, co&mung that the method IS smtable for the simple polar snow matrix