Objective To establish a method for on-line determination of anionic surfactants in hospital sewage using a flow injection analyzer.
Methods The sample was filtered by a filter membrane and then entered the flow injection analyzer for determination.
Results The content of anionic surfactant showed a good linear relationship within the range of 0.012-2.000 mg/L (r=0.999 8), with a detective limit of 0.003 mg/L, relative standard deviations of 0.8%-3.7%, and recovery rates of 93.3%-101.8%.
Conclusion The method has the advantages of simple operation, good repeatability, and short detection cycle and can also reduce the risk of occupational hazards, and therefore, it is suitable for the detection of large quantities of samples.
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