Propazine water monitoring

Membrane separation coupled on-line to a flow-injection system was employed for the monitoring of propazine and terbutryn in natural water. A microporous hydro-phobic membrane was utilized in which the analytes were extracted from the aqueous medium into an organic solvent that was carried to the flow cell of a photodiode-array spectrophotometer. The LCDs were 4-5 qg so the technique could potentially be used for screening purposes. Samples with positive detection would require further analysis. 

There are limited monitoring data for cyanazine and propazine from CWS with groundwater and surface water sources. USEPA (1989a) has established lifetime HALs of 1.0 and lO.Oppb for cyanazine and propazine, respectively. 

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