作者:Huihui Lu、Hongbing Ma、Guanhong Tao
DOI:10.1016/j.saa.2009.04.007
日期:2009.9
A spectrophotometric method for the determination of triclosan in personal care products was proposed. It was based on the reaction of sodium nitrite with p-sulfanilic acid in an acidic medium to form diazonium ion, with which triclosan further formed an azo compound in an alkaline medium. The resulting yellow colored product has a maximum absorption at 452 nm. A good linear relationship (r=0.9999) was obtained in the range of 0-30 mg L-1 triclosan. A detection limit of 0.079 g L-1 was achieved and the relative standard deviation was 0.24% (n = 11) at 14 mg L-1 triclosan. The proposed method has been applied to the analyses of triclosan in several personal care products and the results were in good agreement with those obtained by high-performance liquid chromatography. (C) 2009 Elsevier B.V. All rights reserved.