磁力搅拌-电感耦合等离子体发射光谱测定石灰性土壤中交换性盐基  

The method of magnetic stirring-inductively coupled plasma emission spectroscopy to determine exchangeable bases in calcareous soil

作　　者：王华 和振云 李凯学 张清华 王玉功 余志峰 WANG Hua;HE Zhen-yun;LI Kai-xue;ZHANG Qing-hua;WANG Yu-gong;YU Zhi-feng(Third Geological and Mineral Exploration Institute of Gansu Geological and Mineral Development Bureau,Lanzhou Gansu 730050)

机构地区：[1]甘肃省地质矿产勘查开发局第三地质矿产勘查院,甘肃兰州730050

出　　处：《中国土壤与肥料》2024年第7期236-240,共5页Soil and Fertilizer Sciences in China

基　　金：甘肃省科技厅重点研发计划(2020年度)项目(20YF3GA010);甘肃自然资源厅2024年青年人才团队项目(农业土壤有效态标准样品研制及青年人才培养)。

摘　　要：以磁力搅拌提取、离心对土壤样品进行前处理,等离子体发射光谱法测定样品交换液中交换性钾、钠、钙、镁4项盐基。研究出一套适合批量农业土壤交换性盐基的测试方法,方法简便、高效节能、稳定、易于掌握。方法检出限为交换性钾0.025cmol/kg,交换性钠0.028cmol/kg,交换性钙0.040cmol/kg,交换性镁0.019cmol/kg;方法精密度的标准偏差(n=6)为1.46%~4.93%,均小于5%,国家有证标准物质的测定结果与推荐值一致,满足质控要求。Soil samples were extracted by magnetic stirring and centrifugation,and four salt groups of exchange potassium,sodium,calcium and magnesium in sample exchange fluid were determined by plasma emission spectroscopy.A set of determination method suitable for batch agricultural soil was developed,which was simple,efficient and energy saving,stable and easy to master.The detection limit was exchangeable potassium 0.025 cmol/kg,exchangeable sodium 0.028 cmol/kg,exchangeable calcium 0.040 cmol/kg,exchangeable magnesium 0.019 cmol/kg.The determination results of the national certified standard substances were consistent with the recommended value and met with the quality control requirements.

关 键 词：磁力搅拌 农业土壤 交换性钾、钠、钙、镁 等离子体发射光谱 

分 类 号：S153[农业科学—土壤学] O657.3[农业科学—农业基础科学]