DIN ISO 20279-2006 土壤质量.铊的萃取和电热原子吸收光谱法测定

标准号：DIN ISO 20279-2006
中文标准名称：土壤质量.铊的萃取和电热原子吸收光谱法测定
英文标准名称：Soil quality - Extraction of thallium and determination by electrothermal atomic absorption spectrometry (ISO 20279:2005);English version of DIN ISO 20279:2006-01
标准类型：B11
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：B11
国际标准分类号：13.080.10
适用范围：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.