钼酸铵分光光度法测定水中总磷方法的改进  

Improvement of Determination of Total Phosphorus in Water by Ammonium Molybdate Spectrophotometry

作　　者：张晴 ZHANG Qing(Beijing Railway Disease Prevention Medical Research Center,China Railway Beijing Bureau Group Co.,Ltd.,Beijing 100038,China)

机构地区：[1]中国铁路北京局集团有限公司北京铁路疾病预防医学研究中心,北京100038

出　　处：《铁路节能环保与安全卫生》2024年第3期43-48,共6页Railway Energy Saving & Environmental Protection & Occupational Safety and Health

摘　　要：对钼酸铵分光光度法测定废水中总磷方法的消解过程进行优化,提升检测工作效率。使用DRB200消解仪和配套消解管替代钼酸铵分光光度法使用的消解设备(医用手提式蒸汽消毒器或一般压力锅),选择最优消解条件150℃下20 min对水样进行消解,并对方法的准确度、精密度等进行检测计算,得出改进方法的可行性。结果表明,标准系列在0~1.2μg/mL浓度内,相关系数为0.999 8;回收率93.3%~107.0%;检测GSB07-3169-2014、批号2039119水质总磷标准参考样,测定值在标准范围内。应用钼酸铵分光光度法对工业废水中总磷进行检测时,采用DRB200消解仪对样品进行消解,具有操作简便、耗时短、安全性高等特点,能够有效提高实验效率。The digestion process in the determination of total phosphorus in wastewater by ammonium molybdate spectrophotometer was optimized to improve the detection efficiency.DRB200 digesters and supporting tubes instead of ammonium spectrophotometer digesters(medical hand-held steam sterilizers or general pressure cookers)were used,the optimal digestion condition was 150°C for 20 min to digest the water sample,and the accuracy and precision of the method were tested and calculated,and the feasibility of the improved method was obtained.The results showed that the correlation coefficient of the standard series was 0.9998 in the concentration range of 0~1.2μg/mL;the recovery rate is 93.3%~107.0%;GSB07-3169-2014,batch number 2039119 water quality total phosphorus standard reference sample was detected,and the measured value was within the standard range.Ammonium molybdate spectrophotometric method for the determination of total phosphorus in industrial wastewater with DRB200 digestion instrument for sample digestion,has the characteristics of simple operation,short time consumption,high safety and so on,can effectively improve the experimental efficiency.

关 键 词：总磷 钼酸铵分光光度法 快速消解 精密度 准确度 

分 类 号：X832[环境科学与工程—环境工程]