A CONTINUOUS-FLOW SYSTEM FOR SENSITIVE URUSHIOL DETECTION USING A NEWCHEMILUMINESCENT REACTION

By using a new chemiluminescent (CL) reaction system consisting of an urushiol/hydrogen peroxide/sodium hydroxide/dye-sensitizer, a sensitiv e urushiol detection system was developed which featured a continuous flow method. The system comprises three-channel flow manifolds includi ng an introduction manifold for the urushiol sample. The system has so me advantages as regards instrumentation, sensitivity and analytical t ime; the detection limit is 1.0 x 10(-5) M (S/N=2); the analytical tim e required is less than 30 s for one sample feeding; the relative stan dard deviation is 6.2% for 5 repeated runs of the 1.0 x 10(-4) M urush iol solution. A possible explanation for the CL reaction mechanism is also presented.