恒温摇床提取-电感耦合等离子体发射光谱法测定土壤中有效硫  

Determination of available sulfur in soil by inductively coupled plasma emission spectrometry with constant temperature shaker extraction

作　　者：向勇 谢莉蓉 易田芳 邓聂 李发 XIANG Yong;XIE Li-rong;YI Tian-fang;DENG Nie;LI Fa(Hunan Division of GRG Metrology and Test,Changsha Hunan 410000;Key Laboratory of Southern Farmland Pollution Prevention and Control,Ministry of Agriculture and Rural Affairs,Changsha Hunan 410000)

机构地区：[1]广电计量检测(湖南)有限公司,湖南长沙410000 [2]农业农村部南方耕地污染防控重点实验室,湖南长沙410000

出　　处：《中国土壤与肥料》2021年第6期368-372,共5页Soil and Fertilizer Sciences in China

摘　　要：采用恒温摇床进行土壤有效硫前处理,通过电感耦合等离子发射光谱仪进行测试,建立起一种全新的土壤有效硫检测方法。结果表明,该方法对土壤有效硫的测定准确性好,土壤标准物质的测定结果均在保证值范围内;该方法对土壤中有效硫的检出限为0.5 mg/kg;土壤标准有证样品相对标准偏差(n=6)为2.47%~4.59%;通过不同地区耕地实际土壤比对测试,有效硫试验结果与标准方法试验结果的相对偏差为0.63%~8.38%。该方法适用于不同类型土壤有效硫的检测,结果准确可靠,简便快捷,特别适用于批量土壤样品检测。A constant temperature shaker is used to pre-treat the available sulfur in the soil,and the inductively coupled plasma emission spectrometer is used for testing to establish a new detection method for soil available sulfur.The result shows that this method has good accuracy in determining soil available sulfur,and the results of soil reference materials are within the guaranteed value range.The detection limit of this method for soil available sulfur is 0.5 mg/kg.The relative standard deviation(n=6)of the certified standard soil samples is between 2.47%and 4.59%.Through the contrast test of actual cultivated soil in different areas,the relative deviation of the available sulfur between the comparison test and the standard method is from 0.63%to 8.38%.This method is suitable for the detection of available sulfur in different types of soils,and the results are accurate,reliable,simple and quick,and are especially suitable for the detection of large batch soil samples.

关 键 词：恒温摇床 土壤有效硫 电感耦合等离子体发射光谱仪 

分 类 号：O657.31[理学—分析化学] S153.6[理学—化学]