2009•China Water & WastewaterRequires access
Determination of Total Nitrogen and Phosphorus in Water by Automatic High Pressure Digestion/Flow Injection Analyzer
Wei Chen
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Abstract
The flow injection analyzer was used for determination of total nitrogen and phosphorus in water.The results show that there is a good linear relationship when the total nitrogen and phosphorus are in the range of 0.00 to 10.0 mg/L and 0.00 to 1.00 mg/L respectively.The relative errors are all less than 5%.The relative standard deviations are all in the range of 1% to 3%.The minimum detection limits are 2.27 μg/L and 2.11 μg/L respectively,being lower than those by the national method.The recoveries of total nitrogen and phosphorus are 97.2% to 108% and 100% to 106% respectively.The method is suitable to automatically analyze total nitrogen and phosphorus in water at the same time.