PuSH - Publication Server of Helmholtz Zentrum München: HF-Totalaufschluß im geschlossenen System für Element- und Spurenelementbestimmungen in Boden, Klärschlamm, Sedimenten u. ä. Proben.

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Schramel, P. ; Lill, G. ; Seif, R.

HF-Totalaufschluß im geschlossenen System für Element- und Spurenelementbestimmungen in Boden, Klärschlamm, Sedimenten u. ä. Proben.

A complete HF digestion method for element and trace element determination in soils, sediments, sludges and other similar samples using a closed system.

Fresenius Z. Anal. Chem. 326, 135-138 (1987)

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Based on the earlier described pressure ashing device [1], a modified system is described for a complete HF-ashing technique of silicate matrices like soils, sediments and sludges. Using graphite fortified PTFE material in combination with pure PTFE sample containers, it is possible to apply a mixture of HNO3/HF for ashing in the closed pressure ashing apparatus. This technique was tested with several standard reference materials. The advantage of the new system is a considerable saving of time, freedom of contamination and element losses in comparison to the open techniques.

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