比浊法测定土壤有效硫的探讨  

Discussion of the turbidimetry for available sulfur in soil

作　　者：蔡顺香[1] 颜明娟[1] 杨杰[1] 

机构地区：[1]福建省农科院土壤肥料研究所,福建福州350013

出　　处：《福建分析测试》2003年第2期1746-1749,共4页Fujian Analysis & Testing

摘　　要：对比浊法测定土壤有效硫中的前处理部分进行了改进,即采用活性碳代替H_2O_2去除有机质,活性碳用量以0.04g为最佳;对12种不同土壤采用改进的新方法测定,结果与原方法显著相关,相关系数为0.9966,相关方程为Y=3.4121+1.0531X,新方法的回收率为96.48%～101.15%,标准差为0.099～0.382,变异系数为0.547%～4.321%,与原方法相比,新方法更加快速、简便、精确、重复性和再现性均好,易于推广。We removed the organic substance from soil by using activated charcoal on available sulfur determination and established the best number of the activated charcoal. The recovery of this method was 96. 48% ~101. 15%. the standard deviation was 0. 099-0. 382, the relative standard deviation was 0. 547%~4. 321%. The method was proved to be rapid, pricise, reliable and can be normal analysis.

关 键 词：比浊法 土壤 有效硫 测定 活性碳 有机质 回收率 标准差 

分 类 号：S153.6[农业科学—土壤学]