土壤质量.铊的萃取和电热原子吸收光谱法测定(ISO 20279:2005)；英文版本DIN ISO 20279:2006-01

详细信息   

• 中文主题词：吸收分光光度测定法 ; 原子吸收分光光度测定法 ; 底部 ; 化学的 ; 土壤组分 ; 测定 ; 干燥 ; 电热的 ; 萃取 ; 调查 ; 措施 ; 方法 ; 土壤采样 ; 土壤普查 ; 土壤 ; 试验报告 ; 试验 ; 铊
• 标准号：DIN ISO 20279-2006
• 发布日期：2006-01-01
• 英文题名：Soil quality - Extraction of thallium and determination by electrothermal atomic absorption spectrometry (ISO 20279:2005);English version of DIN ISO 20279:2006-01
• 英文主题词：Absorption spectrophotometry ; Atomic absorption spectrophotometry ; Bottom ; Chemical ; Composition of the ground ; Determination ; Drying ; Electrothermal ; Extraction ; Investigations ; Measure ; Methods ; Soil sampling ; Soil surveys ; Soils ; Test reports ; Testing ; Thallium
• 标准状态：现行
• 发布单位：DE-DIN
• 国际标准分类号：13.080.10
• 载体形态：12P.;A4
• 中国标准分类号：B11
• 国别：德国标准化学会

文摘

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.