连续流动-钼酸铵分光光度法测定土壤全磷  

Determination of Total Phosphorus in Soil Using Continuous Flow Analysis and Ammonium Molybdate Spectrophotometry

作　　者：彭园珍[1] 肖华翠 林燕语[1] 杨柳明[1,2] PENG Yuanzhen;XIAO Huacui;LIN Yanyu;YANG Liuming(School of Geographical Sciences,Fujian Normal University,Fuzhou 350117,China;Key Laboratory for Humid Subtropical Eco-geographical Process of the Ministry of Education,Fuzhou 350117,China)

机构地区：[1]福建师范大学地理科学学院,福建福州350117 [2]湿润亚热带生态-地理过程省部共建教育部重点实验室,福建福州350117

出　　处：《福建师范大学学报（自然科学版）》2024年第3期24-28,53,共6页Journal of Fujian Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(32171587);福建省中青年教师教育科研项目资助(JAT220042)。

摘　　要：利用硫酸-高氯酸湿法消解土壤,采用连续流动分析仪直接测定消解液磷酸根含量,建立了高通量测定土壤全磷的实验方法。方法检测限6.0 mg·kg^(-1),土壤样品的加标回收率为85%~100%。将该方法用于土壤标准物质(GBW07405、GBW07406a)全磷含量测定,结果准确,相对标准偏差(RSD)分别为3.5%、4.5%(n=3)。方法具备无需调节待测液pH值、分析速度快、消耗试剂少、结果准确可靠等优点,适用于大批量土壤全磷的测定分析。A high-throughput method was established for determining total phosphorus in soil using continuous flow analysis and ammonium molybdate spectrophotometry.The detection limit was 6.0 mg·kg^(-1).The recovery rates for soil samples ranged from 85%to 100%.This method was applied to certified reference materials(GBW07405 and GBW07406a)for total phosphorus determination,yielding accurate results with relative standard deviations(RSD)of 3.5%and 4.5%,respectively(n=3).The method does not require pH adjustment of the test solution.It is fast,consumes minimal reagents,and provides accurate and reliable results,making it suitable for determining and analyzing large quantities of soil samples for total phosphorus.

关 键 词：连续流动分析 土壤 消解 全磷 分光光度法 酸度 

分 类 号：S151.9[农业科学—土壤学]