SmartChem140全自动化学分析仪测定土壤全氮全磷的研究  

Research on the Determination of Total Nitrogen and Total Phosphorus in Soil Using SmartChem140 Automatic Chemical Analyzer

作　　者：陈剑磊 谢文霞[1] 崔育倩[1] 张艳[1] 

机构地区：[1]青岛大学化学科学与工程学院,山东青岛266071

出　　处：《分析科学学报》2016年第1期84-88,共5页Journal of Analytical Science

基　　金：国家自然科学基金(No.41406089);青岛市民生计划(No.13-1-3-110-nsh);山东省自然科学基金(No.ZR2013BQ006);山东省高等学校青年骨干教师国内访问学者项目;青岛市民生科技计划项目(No.14-8-3-4-nsh)

摘　　要：本文以胶州湾湿地土壤为样品,建立了基于SmartChem140全自动化学分析仪,同时测定土壤全氮和全磷的方法。利用全自动化学分析仪可以同时快速、准确测定土壤中的全氮和全磷,全氮和全磷分别在0~6.0mg·L-1和0~5.0mg·L-1范围内线性良好,相关系数（R2）分别为0.9994、0.9995;测定结果与凯氏定氮法、磷钼蓝比色法对比无显著差异,相对误差均小于4%,相对标准偏差分别为1.39%和1.07%,样品的加标回收率分别在97.68%~102.12%和97.35%~101.88%之间。研究结果表明,该方法准确度高、稳定性好,回收率高,操作简便,测定结果能满足对土壤全氮、全磷的监测要求。In this paper,we used the SmartChem140 Automatic Chemistry Analyzer method to determine total nitrogen（TN）and total phosphorus（TP）in the soil samples in Jiaozhou Bay wetland.The method can quickly and accurately determine TN and TP in the soil.The linear ranges of TN and TP were 0-6mg·L-1 and 0-5mg·L-1 with the correlation coefficients（R2）of 0.9994 and 0.9995,respectively.There were no significant difference between determination results of the method and those of the traditional kjeldah method and the Phosphorus molybdenum blue colorimetric method.The relative errors were less than4%,the relative standard deviations were 1.39% and 1.07% and the adding standard recoveries were97.68%-102.12% and 97.35%-101.88%,respectively.Results showed that the method had high accuracy and recovery,good stability with simple operation,and could meet the requirements for soil TN and TP monitoring.

关 键 词：全自动化学分析仪 胶州湾湿地 土壤 全氮 全磷 

分 类 号：O657[理学—分析化学]