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oa South African Journal of Chemistry - Micelle-mediated extraction and cloud point pre-concentration for the spectrophotometric determination of phenol in water samples : research article

 

Abstract

In this paper, a cloud point extraction method for the determination of trace amounts of phenol by spectrophotometry is described. The method is based on the colour reaction of phenol with diazotized p-nitroanilinean alkaline media and the cloud point extraction of azo dye product using of nonionic surfactant Triton X-114. The effects of reaction and extraction parameters were studied and optimum parameters were established. The calibration graph was linear in the range of 2.0-400 ng mL-1 of phenol. Detection limit based on three times the standard deviation of the blank (3S) was 1.0 ng mL-1 and the relative standard deviation (RSD) for 50 ngmL-1 of phenol was 1.73%(=10). The proposed method was applied for the determination of phenolin water samples.

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/content/chem/64/1/EJC24543
2011-01-01
2016-12-06
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