在线紫外/过硫酸盐消解—流动注射分析法测定水中总磷  

Determination of total phosphorus in water by on-line UV persulfate digestion and flow injection

作　　者：罗展纲[1] 杨敏[1] 黄碧兰[1] 

机构地区：[1]深圳市龙岗区疾病预防控制中心,深圳518172

出　　处：《中国卫生检验杂志》2013年第8期1888-1890,共3页Chinese Journal of Health Laboratory Technology

摘　　要：目的：研究利用在线紫外／过硫酸盐消解一流动注射分析法测定水中总磷，用于饮用水、地表水、盐水以及生活和工业废水中总磷的测定，以实现自动化批量分析。方法：采用FSIV＋型流动注射仪，水样中的有机磷通过在线紫外／过硫酸盐消解转化为正磷酸盐，正磷酸盐与钼（VI）和锑（m）在酸性介质中反应生成锑一磷钼酸盐化合物，该化合物与抗坏血酸反应生成蓝色，在880nm处进行检测。结果：方法的相关系数为0．9990（n=6），标准及样品测定的相对标准偏差均〈5％，检出限为0．005mg／L，回收率范围：88．1％～106％。结论：方法快速、准确、灵敏度高，结果令人满意。Objective： To research the determination of total phosphorus in water by on -line UV persulfate di- gestion and flow injection analysis and detect the total nitrogen in surface water, groundwater, saline water and in- dustrial wastewater in order to realize automatic batch analysis. Methods： In this study, FSIV ＋ flow injection ana- lyzer was selected. Organi acid digestion. Antimony c phosphorus in water sample was converted to orthophosphate by on - line UV/persulfate - phosphomolybdate complex were produced by reaction of orthophosphate molybdenum （ WI ） and antimony（ m ） in acid medium. This complex subsequently reacted with ascorbic acid to show blue color, and the absorbance was measured at 880 nm. Results： This method had a good linearity （ r 〉 0. 9990, n = 6） , the RSD of the standard and samples were both less than 5%. The recovery rate of samples was between 88.1% and 106%, and the method detection limit was 0. 005 mg/L. Conclusion： The method is rapid, accurate and highly sensitive with satisfactory results.

关 键 词：流动注射 水质 总磷 

分 类 号：O657.32[理学—分析化学]