GB/T 11893-1989 《Water quality--Determination of total phosphorus--Ammonium molybdate spectrophotometric method》 Related products

This standard specifies the use of ammonium molybdate Spectrophotometric method, spec-trophotometry to determine the concentration of total phosphorus in water. Total phosphorus includes dissolved, particulate, organic and inorganic phosphorus, and is suitable for the detection of surface water, sewage and industrial wastewater. Before determination, the sample needs to be digested by potassium sulfate or nitric acid-perchloric acid to ensure that all phosphorus is converted into normal phosphoric acid salt. The minimum detection concentration of this method is 0.01 mg/L, and the upper limit of the determination is 0.6 mg/L. It is suitable for the determination of phosphorus content in environment monitoring and water quality analysis.