流动注射-分光光度法测定河口水中磷酸盐及盐效应的校正办法
FI-Spetrophotometric Determination of Phosphate in Estuarine Water and Method of Correction for Salt Effect
摘 要
提出了用流动注射分光光度法测定河口水中磷酸盐,并对可能干扰测定的折射效应、基体效应和动力学效应等3种类型盐效应进行了讨论。结果表明:磷酸盐的测定仅受折射效应的干扰,试验通过调整样品进样量、反应时间和积分时间等参数对其进行校正。方法线性范围为5.00~480 μg·L-1,检出限(3S/N)为1.04 μg·L-1。方法用于分析河口水样,测定值的相对标准偏差(n=7)为1.4%,平均回收率为100.4%。
分光光度法
盐效应
磷酸盐
河口水样
FI
Spectrophotometry
Salt effect
Phosphate
Estuarine water
Abstract
A method of FI-spectrophotometry for the determination of phosphate in estuarine water was proposed. Salt effects, including refraction effect, matrix effect and kinetic effect, were discussed, and it was found that only refraction effect interfered with the determination. It was shown that this interference was avoided by adjusting the sample volume, reaction time, and time of integration. Linearity range was kept between 5.00-480 μg·L-1 of phosphate, with detection limit (3S/N) of 1.04 μg·L-1. The proposed method was applied to the analysis of estuarine water sample, giving value of RSD (n=7) of 1.4%, and value of average recovery of 100.4%.
中图分类号 O657.32
所属栏目
基金项目 国家高技术研究发展(863)计划(2007AA092001)
收稿日期 2010/8/11
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备注杨颖(1976-),女,天津人,硕士,研究方向为海洋环境监测与评价。
引用该论文: YANG Ying,LIU Peng-xia,YANG Xing-xing,ZHANG Hui. FI-Spetrophotometric Determination of Phosphate in Estuarine Water and Method of Correction for Salt Effect[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2011, 47(10): 1203～1205
杨颖,刘鹏霞,杨幸幸,张辉. 流动注射-分光光度法测定河口水中磷酸盐及盐效应的校正办法[J]. 理化检验－化学分册, 2011, 47(10): 1203～1205
被引情况:
【1】杨颖,程祥圣,张辉, "流动注射-分光光度法测定河口水中氨氮的盐效应及校正",理化检验－化学分册 51, 197-199(2015)
【2】朱敬萍,胡红美,张小军,顾蓓乔,陈瑜,金雷, "流动注射法同时测定海水中氨氮和磷酸盐",理化检验－化学分册 51, 761-764(2015)
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参考文献
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【8】GB/T 17378.4-2007海洋监测规范［S］.
【2】高甲友.流动注射荧光猝灭法测定环境水样中痕量磷［J］.环境污染与防治, 2003,2:42-44.
【3】李俊,刘芳,华桂珍.流动注射光度法测定水中磷［J］.环境监测管理与技术, 2004,5:16-19.
【4】王庆霞,苏苓.孔雀绿体系流动注射光度法测定水中正磷酸盐［J］.环境监测管理与技术, 2006,6:19-21.
【5】王萍,张新申.反相流动注射法测定海水中磷酸盐［J］.环境监测管理与技术, 2006,2:26-28.
【6】STEWART B M, ELLIOTT P A W. Systematic salt effects in the automated determination of nutrients in seawater［J］. Water Research, 1996,30(4):869-874.
【7】AMINOT A, KROUEL R. An automated photo-oxidation method for the determination of dissolved organic phosphorus in marine and fresh water［J］. Marine Chemistry, 2001,76(1/2):113-126.
【8】GB/T 17378.4-2007海洋监测规范［S］.
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