Determination of Trace PO_4--(-3) by Quenching Fluorescence with Flow Injection Analysis

研究了以铝- 桑色素为荧光试剂， 在酸性条件下利用荧光熄灭法， 并结合了流动注射分析测定了水中微量磷酸根离子的方法. 测定PO3 -4 的线性范围1 ~9 Mg/l， 检测限为0-002 Mg/l， 1H可以测定60 份样品， 相对标准偏差为1-09 % .A method is investigated to determinate trace PO 4 3- in acid solution based on oxygen quenching aluminium-morin fluorescence intensity combining with flow-injection analysis.The linearship is between 1～9mg/L with the limit of detection 0 002mg/L.60 samples per hour can determinated by this method with RDS 1 09%.国家863计划资助!（818－Q－09