Chemiluminescent determination of cyromazine in milk samples using copper(III) chelate-Triton X-100 by flow injection analysis
Muhammad Asghar , Mohammad Yaqoob , Abdul Nabi
Chemical Research in Chinese Universities ›› 2017, Vol. 33 ›› Issue (3) : 354 -359.
Chemiluminescent determination of cyromazine in milk samples using copper(III) chelate-Triton X-100 by flow injection analysis
Cyromazine(CYR) was determined in milk samples using copper(III) chelate-Triton X-100 chemiluminescence(CL) system associated with flow-injection(FI) in KOH medium. The relative CL intensity for CYR concentration was linear over the range of 5×10–4―10 μg/mL(R 2=0.9990, n=11) with injection rate of 160 h–1 and the relative standard deviation(RSD, n=4) of 1.2%―2.6%. The limit of detection(LOD) for signal-to-noise ratio of 3 was 1.5×10–4 μg/mL. The influences of key chemical and physical parameters, some major fresh water ions at their maximum admissible concentrations and a number of pesticides were examined as potential interferences. The concentrations of CYR in spiked milk samples were successfully determined by the proposed method and the results were in good agreement with the previously reported HPLC method, having recovery range of (92±4)%―(106±2)%. The possible CL reaction mechanism for copper(III) complex-Triton X-100-CYR was also briefly discussed.
Chemiluminescence / Flow injection analysis / Cyromazine / Milk sample
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