摘要
为了提高不同类型土壤中有效态CEC测定的准确度,针对HJ 889—2017标准中三氯化六氨合钴浸提-分光光度法测定土壤中CEC的不足,对空白试样的制备、土壤试样及浸提液的取样量、离心取清液进行了适当改良处理。实验结果证明,本次改良对不同有机质含量的酸性、中性和石灰性土壤的CEC测定结果更准确,且可减少试剂的消耗。改良后本法可适用于各类型土壤大批量测定阳离子交换量。
In order to improve the accuracy of the determination of effective CEC in different types of soil,in response to the shortcomings of the HJ 889-2017 standard for the determination of CEC in soil by cobalt trichloride leaching spectrophotometry,appropriate improvements were made to the preparation of blank samples,the sampling amount of soil samples and extracts,and the centrifugation of clear solution.The experimental results demonstrate that the CEC measurement results of acidic,neutral,and calcareous soils with different organic matter contents are more accurate and can reduce reagent consumption.After improvement,this method can be applied to large-scale determination of cation exchange capacity in various types of soil.
作者
冯琴琴
孙捷
黄强
Feng Qinqin;Sun Jie;Huang Qiang(Huzhou Standard Spectrum Environmental Testing Technology Co.,Ltd.,Huzhou Zhejiang 313099;Huzhou Zhongyi Testing and Research Institute Co.,Ltd.,Huzhou Zhejiang 313098)
出处
《山西化工》
2023年第4期33-34,48,共3页
Shanxi Chemical Industry
关键词
空白试样
试样及浸提液减半
针头式过滤器
blank sample
reduce the sample and extract by half
syringe-driven filter
