开氏消煮-常量蒸馏-纳氏试剂光度法测定土壤中的全氮量  

Using the Kelvin Digestion-Macro-sample Distillation-Nessler's Reagent Colorimetric Method to Test the Total Nitrogen of the Soil

作　　者：周敏 李欣红 

机构地区：[1]广州市环境监测中心站,广州510030

出　　处：《现代科学仪器》2004年第1期26-27,共2页Modern Scientific Instruments

摘　　要：采用开氏消煮 常量蒸馏 纳氏试剂光度法测定土壤中的全氮量 ,其变异系数为 1.9%～ 3.4 % ,蒸馏试验回收率为 93%～ 11% ,与经典的测定方法相比 ,相对误差为 0 .9%～ 3.4 %。该方法和经典的半微量 滴定法相比 ,操作简便 。The authors use the Kelvin digestion-macro-sample distillation-Nessler's reagent colorimetric method to test the total nitrogen of the soil. It is easier to operate and more quick to test mass samples than the traditional method. The result of the experiment shows that the coefficient of variation and the recovery rate of this method are 1.9%～3.4% and 93%～101%. The relative error which compares with the traditional method is 0.9%～3.4%.

关 键 词：常量蒸馏法 半微量蒸馏法 纳氏试剂比色法 土壤全氮量 

分 类 号：X833[环境科学与工程—环境工程]