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Determination of thiram in natural waters using flow-injection with cerium(IV)-quinine chemiluminescence system


Determination of thiram in natural waters using flow-injection with cerium(IV)-quinine chemiluminescence system



Luminescence: the Journal of Biological and Chemical Luminescence 25(1): 71-75



ISSN/ISBN: 1522-7235

PMID: 19630089

DOI: 10.1002/bio.1147

A simple and rapid flow-injection chemiluminescence method has been developed for the determination of dithiocarbamate fungicide thiram based on the chemiluminescence reaction of thiram with ceric sulfate and quinine in aqueous sulfuric acid. The present method allowed the determination of thiram in the concentration range of 7.5-2500 ng/mL and the detection limit (signal-to-noise ratio = 3) was 7.5 ng/mL with sample throughput of 120/h. The relative standard deviation was 2.5% for 10 replicate analyses of 500 ng/mL thiram. The effects of foreign species including various anions and cations present in water at environmentally relevant concentrations and some pesticides were also investigated. The proposed method was applied to determine thiram in spiked natural waters using octadecyl bonded phase silica (C(18)) cartridges for solid-phase extraction. The recoveries were in the range 99 +/- 1 to 104 +/- 1%.

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Accession: 052537261

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