消解炉消解-氧化还原滴定法测定土壤样品中有机质  

Determination of Organic Matters in Soil Samples by Oxidation-Reduction Titration with Furnace Digestion

作　　者：熊艳[1] 钟夏阳[1] 陈金保[1] 

机构地区：[1]江西省地矿局实验测试中心,江西南昌330030

出　　处：《岩矿测试》2006年第2期191-192,共2页Rock and Mineral Analysis

摘　　要：沿用经典重铬酸钾氧化-外加热法的原理,建立了消解炉消解-氧化还原滴定法测定土壤样品中有机质的方法。实验选择消解温度为180-200℃,消解时间为10-15 min。方法用于大批量区域多目标地球化学调查样品中有机质的分析,测试值与标准值相符。对国家土壤标准物质进行测定,方法精密度(RSD,n=8)为 1．93％～7．96％。Based on the principle of classical potassium dichromate oxidation-outer heating, a method for the determination of organic matters in soil samples by oxidation-reduction titration with furnace digestion was proposed. The digestion condition was optimized to 180 ～ 200℃ and 10 ～ 15 min. The method has been applied to the determination of organic matters in samples from multi-goal geochemical survey project and the results are in agreement with standard values. The precision of the method is 1.93%～7.96%RSD （n =8）.

关 键 词：氧化还原滴定法 消解炉消解 有机质 土壤 

分 类 号：O655.23[理学—分析化学] O613.71[理学—化学]