Determination of Total Phosphorus in Water Samples by Flow-Injection Analysis

摘要

A new colorimetric-FIA method for the determination of total phosphorus in water samples has been described.For the purpose of the above analysis the newly invented constant micro-flux mixing pumps,as well as the PLC(industrial programmable controller)manipulator and IOP(intelligent operation panel)were used to simplify the procedure.The proposed method allowed one to determine total phosphorus in the concentration range:0.02-0.50 mg L~(-1),with a detection limit of 0.005 mg L~(-1).The analysis required only 4 min to be completed.The proposed method is suitable for the automated and continuous analysis,and was successively applied to the determination of total phosphorus in wastewater samples.