Malaysian
Journal of Analytical Sciences Vol 17 No 3 (2013): 394 – 402
DETERMINATION OF ANILINE DEGRADED FROM
(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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