|关键词: 总磷 分析方法 浊度 预处理方式
|Discussions on Determination of Total Phosphorus in Associated Cross border Water Quality Monitoring
LU Huihui， PENG Yan
Changzhou Environmental Monitoring Center， Changzhou，Jiangsu 213000， China
|The effects of different analysis methods for removing turbidity and sample pretreatments on the determination of total phosphorus in surface water were studied. The results showed that ammonium molybdate spectrophotometry was more suitable than continuous flow analysis method， stannous chloride reductive spectrophotometry and PMA Malachite green spectrophotometry in associated cross border water quality monitoring. When the chromaticity of water samples did not exist， turbidity-chromaticity compensation and centrifugation could effectively remove the turbidity interference with relative error of less than ±10%. Differences of pretreatment methods directly influenced the testing result of total phosphorus， which was the most important factor resulting in poor comparability of determination results between monitoring institutions.
|Key words: Total phosphorus Analysis methods Turbidity Sample pretreatments