Malaysian Journal of Analytical Sciences Vol 17 No 3 (2013): 394 – 402

 

 

 

DETERMINATION OF ANILINE DEGRADED FROM SUDAN I IN CLOTHS

 

(Penentuan Anilin Yang Terurai Daripada Sudan I Dalam Kain)

 

Chong Kian Wei*, Loke Chui Fung and Chan Kar Men

 

Department of Chemistry and Biology,

Faculty of Applied Sciences and Computing,

Tunku Abdul Rahman University College, Jalan Genting Kelang, Setapak, 53300 Kuala Lumpur, Malaysia

 

*Corresponding author: chongkw@acd.tarc.edu.my

 

 

Abstract

A method development for the determination of an aromatic amine degraded from an azo dye in cloths was carried out. Sodium dithionite was used to cleave the azo bond of Sudan I into its aromatic amines, and the amines, mainly aniline were analyzed using high performance liquid chromatography (HPLC) with UV detection. The efficiency of the reduction process of Sudan I, based on the degree of decolorization of dye, was measured using the spectrophotometer. The optimized values of the reduction process was found effective when 1:1 ratio  of 0.30% sodium dithionite to Sudan I (dit/Sud) was used at pH 8. The recovery percentage and relative standard deviation (R.S.D.) of this method was found to be 62.9 – 88.4% and 7.6 – 21.5%, respectively. The proposed method was tested on self-dyed cloth samples with Sudan I. Aniline released from the reduction of Sudan I was detected in the self-dyed cloth samples. The results of this study demonstrate the applicability of sodium dithionite for the reduction of the azo dye in the cloth samples.

 

Keywords: aniline, Sudan I, sodium dithionite, azo dye

 

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