CEC前处理系统—凯氏定氮仪快速测定土壤中的阳离子交换量
胡梦颖, 张鹏鹏, 徐进力, 刘彬, 张灵火, 杜雪苗, 白金峰

Rapid determination of soil cation exchange capacity using a cation exchange capacity pretreatment system and a Kjeldahl apparatus
HU Meng-Ying, ZHANG Peng-Peng, XU Jin-Li, LIU Bin, ZHANG Ling-Huo, DU Xue-Miao, BAI Jin-Feng
表2 方法精密度和准确度结果
Table 2 Precision and accuracy results of the method
样品 CEC/(cmol·kg-1) RSD/%
6次测定结果 平均值 标准值
GBW07412a 21.8
22.1
22.0
22.0
21.6
21.4		 21.8 21.6±1.4 1.31
GBW07415a 20.1
19.2
19.4
19.5
19.2
19.0		 19.4 19±1 1.96
GBW07416a 10.2
10.6
10.4
10.3
10.5
10.6		 10.4 10.0±0.6 1.49
GBW07417a 20.2
19.5
20.0
19.8
20.2
19.6		 19.9 19.7±1.1 1.52
GBW07460 9.9
10.1
10.2
10.3
10.0
10.2		 10.1 9.6±1.3 1.41