Determination of carbaryl by flow injection with luminol chemiluminescence inhibition detection
A flow-injection procedure is described for the determination of carbaryl based on its inhibition effect on luminol-cobalt(II) chemiluminescence reaction in alkaline medium in the presence of hydrogen peroxide. The calibration data over the range 5.0 × 10-7 to 20 × 10-6 M give a correlation coefficient (r2) of 0.9972 with relative standard deviations (RSD; n = 4) in the range of 1.0-2.1% with a limit of detection (3 × blank noise) of 2.37 × 10-7 M for carbaryl. The sample throughput was 120 h-1. The effects of some carbamates, anions, and cations were studied on luminol CL system for carbaryl determination. The proposed method has been applied to determine carbaryl in natural waters.
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Document Type: Research Article
Affiliations: Department of Chemistry, University of Balochistan, Quetta, Pakistan
Publication date: October 1, 2007