標準號：DIN ISO 20279-2006
中文標準名稱：土壤質量.鉈的萃取和電熱原子吸收光譜法測定
英文標準名稱：Soil quality - Extraction of thallium and determination by electrothermal atomic absorption spectrometry (ISO 20279:2005);English version of DIN ISO 20279:2006-01
標準類型：B11
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：B11
國際標準分類號：13.080.10
適用范圍：Thallium is extracted from soil by a mixture of nitric acid and hydrogen peroxide, and determined in solution by electrothermal atomic absorption spectrometry, in which discrete volumes of sample solution are dispensed into a graphite tube. By increasing the temperature of this tube stepwise, the processes of drying, thermal decomposition of the matrix and thermal dissociation into free atoms occur. The resulting absorption signal should (under optimum conditions) be a sharp symmetrical peak with a height proportional to the element concentration in solution.