摘要
农业面源氮磷污染是当前地表水体污染主要来源,而土壤有效态氮磷测试大都依赖于流动分析仪在实验室完成,无法满足个性化土壤有效态氮磷现场测定需求。建立了一种微流池多光程的土壤有效态氮磷测定技术,通过柔性化参数设置,实现不同土壤有效态氮磷测试规范和现场测试。以广东省韶关市农业科学研究所和北京市农林科学院提供的26个样品为例进行有效态铵态氮、硝态氮和磷测定验证。实验结果表明,微流池多光程土壤有效态氮磷测定方法中有效态铵态氮、硝态氮和磷的检出限(LOD)分别为0.0086、0.0094和0.0078 mg/L,相对标准偏差(RSD)分别为0.80%、5.7%和0.90%,加标回收率在92.0%~103%,平均单样品测试时间6 min。测试过程自动化,极大地提升了土壤有效态氮磷测定效率和测试结果准确性,为农业面源污染防治提供技术支撑。
Non-point source pollution(NPSP)from agricultural runoff threatens drinking water quality.Currently,both the available nitrogen and phosphorus are measured by the flow analysis method in the laboratory.This method used in laboratory cannot meet the requirements of the available nitrogen and phosphorus in the field.The paper proposes a determination method of soil available nitrogen and phosphorus using a micro-tube with multi-optical length,which can flexibly set parameters to meet different soil extraction systems and test specifications,and then achieve on-site testing of available nitrogen and phosphorus.In this paper,the measurements of ammonium nitrogen,nitrate nitrogen and available phosphorus in 26 soil samples were arranged to verify the performance of a measurement system using a micro-tube with multi-optical length.The soil samples were provided by the Shaoguan Institute of Agricultural Sciences in Guangdong Province and the Beijing Academy of Agriculture and Forestry Sciences.The test results show that the detection limits(LOD)of ammonium nitrogen,nitrate nitrogen and available phosphorus are 0.0086,0.0094 and 0.0078 mg/L,respectively.The relative standard deviations(RSD)are 0.8%,5.7%and 0.9%.The spiked recoveries are obtained to be 92.0%-103%,The average test time for a sample is 6 min.The measurement process is running automatically,which greatly improves the measurement efficiency and accuracy.Therefore,it can provide technical support for the prevention and control of agricultural non-point source pollution.
作者
位文涛
李振峰
李林泽
苏睿
李晓冬
陈永起
VIJAYA Raghavan
胡建东
WEI Wentao;LI Zhenfeng;LI Linze;SU Rui;LI Xiaodong;CHEN Yongqi;VIJAYA Raghavan;HU Jiandong(College of Mechanical and Electrical Engineering,Henan Agricultural University,Zhengzhou,Henan 450002,China;Henan International Joint Laboratory of Laser Technology in Agriculture Science,Zhengzhou,Henan 450002,China;Henan Wendao Guangdian Science&Technology Co.,Ltd.,Zhengzhou,Henan 450002,China;Department of Bioresource Engineering,McGill University,Montreal H9X3V9,Canada;State Key Laboratory of Wheat and Maize Crop Science,Zhengzhou,Henan 450002,China)
出处
《中国无机分析化学》
CAS
北大核心
2022年第5期58-64,共7页
Chinese Journal of Inorganic Analytical Chemistry
基金
国家重点研发计划项目(2017YFD0801204)
国家自然科学基金资助项目(3201890)
河南省外籍科学家工作室项目(GZS2021007)。
关键词
面源污染
微流池多光程
土壤
有效态氮磷
现场检测
non-point source pollution
micro-tube with multi-optical length
soil
available nitrogen and phosphorus
field experiment
