We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Determination of Available Nitrogen and Phosphorus in Soil Using a Micro-tube with Multi-optical Length.
- Authors
WEI Wentao; LI Zhenfeng; LI Linze; SU Rui; LI Xiaodong; CHEN Yongqi; VIJAYA, Raghavan; HU Jiandong
- Abstract
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 0.008 6, 0.009 4 and 0.007 8 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.
- Subjects
GUANGDONG Sheng (China); PHOSPHORUS in soils; NITROGEN in soils; NONPOINT source pollution; DRINKING water quality; SOIL testing; AGRICULTURAL pollution
- Publication
Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue, 2022, Vol 12, Issue 5, p58
- ISSN
2095-1035
- Publication type
Article
- DOI
10.3969/j.issn.2095-1035.2022.05.009