快速检测土壤阳离子交换量的研究

Research on the rapid determination of cation exchange capacity in soil

针对土壤阳离子交换量检测行业标准推荐方法耗时长、操作繁琐,介绍了一种定氮仪配合漩涡振荡仪测定土壤阳离子交换量的快速蒸馏法,改进了离心处理环节和蒸馏步骤,讨论了关键流程和注意事项。该方法与行业标准乙酸铵法相比,试剂消耗明显减少,检测效率提高45%,检测精度和准确度符合标准要求,特别适于大批量及快速检出的土壤样品分析。

Since the recommendation method of industry criteria was complicated and time consuming,this paper proposed a rapid determination of cation exchange capacity（ CEC） in Soil. By applying azotometer and shaker,the centrifugation and distillation were improved. The key processes and precautions of this method were also discussed. The results showed that the method had satisfied expression in precision and accuracy. It took less time and reagents,and increased efficiency by45% as compared with the traditional method. It is especially suitable for mass and rapid determinations of soil samples.