FOOD SCIENCE ›› 2013, Vol. 34 ›› Issue (22): 213-218.doi: 10.7506/spkx1002-6630-201322043

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Determination of Sulfite in Vegetables and Derived Products by Nitrogen Distillation-Pararosaniline Hydrochloride Spectrophotometric Method

FANG Chang-yun,DUAN Bin-wu,SUN Cheng-xiao,LU Lin,HE Xiao-yan   

  1. Rice Product Quality Supervision and Inspection Center, Ministry of Agriculture, China National Rice Research Institute,Hangzhou 310006, China
  • Received:2013-04-24 Revised:2013-10-09 Online:2013-11-25 Published:2013-12-05

Abstract:

A nitrogen distillation-formaldehyde solution absorption-pararosaniline hydrochloride spectrophotometric
method for the determination of sulfite in vegetables and derived products was developed. The results showed that the
detection limit for sulfite was 0.5 mg/kg in 5.0 g of samples. This method had a good linearity (R2 = 0.9998) for sulfur
dioxide with a concentration ranging from 0 to 10 mg. The relative standard deviation of the proposed method ranged from
0.75% to 3.78%. The recovery rate was in the range of 89.8% ~ 98.3%. The developed method has less color interference
from samples and less pollution. It is easy and simple with good repeatability, which is suitable for the determination of
sulfite in vegetables and derived products.

Key words: nitrogen distillation, vegetables and derived products, sulfite, limit, relative standard deviation

CLC Number: