Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10530060 | Analytica Chimica Acta | 2005 | 5 Pages |
Abstract
A procedure for determining germanium in soil samples using electrothermal atomic absorption spectrometry is discussed. The analyte is leached from the solid sample by the addition of 1 ml of concentrated hydrofluoric acid to 10-300 mg of sample, and the mixture is then submitted to a 10 min ultrasonic treatment. After adding 0.4 g boric acid and 3 ml concentrated hydrochloric acid, germanium is extracted into 1 ml chloroform and back-extracted into an aqueous phase containing (0.05%, w/v) nickel nitrate. Ten micro liter of aqueous phase are introduced into the atomizer and the analytical signal from germanium is obtained using a fast-heating cycle. The detection limit, calculated using three times the standard error of estimate (sy/x) of the calibration graph, is 0.015 μg gâ1. The reliability of the procedure is verified by analyzing several certified reference materials.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
I. López-GarcÃa, N. Campillo, I. Arnau-Jerez, M. Hernández-Córdoba,