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Position: Home > Articles > Determination of Sulfur Dioxide in Preserved Fruits Using Auto-Kjeldahl's Apparatus Combined with Automatic Potentiometric Titrator FOOD SCIENCE 2010,31 (14) 225-228

凯氏定氮-电位滴定仪联合快速检测果脯中的二氧化硫

作  者:
谢艳云;张明明;邓颖妍;孙远明;柳春红
单  位:
华南农业大学食品学院;华南农业大学食品学院,广东省食品安全重点实验室
关键词:
二氧化硫;全自动凯氏定氮仪;自动电位滴定仪;玻璃蒸馏仪
摘  要:
采用FOSS2200型全自动凯氏定氮仪-Metrohm 809型自动电位滴定仪联合快速检测果脯中的二氧化硫,全过程只需6min,不仅操作简单,而且大大缩短了分析时间。经统计学检验,该法与国标中的玻璃蒸馏法测定的结果无显著性差异(P>0.05),相对偏差小于0.94%,加标回收率为90.39%~103.40%,样品最低检出限为2.6mg/kg,适合各种固、液体样品大批量的蒸馏检测。
译  名:
Determination of Sulfur Dioxide in Preserved Fruits Using Auto-Kjeldahl's Apparatus Combined with Automatic Potentiometric Titrator
作  者:
XIE Yan-yun,ZHANG Ming-ming,DENG Ying-yan,SUN Yuan-ming,LIU Chun-hong(Key Laboratory of Food Safety of Guangdong Province,College of Food Science,South China Agricultural University,Guangzhou 510642,China)
关键词:
sulfur dioxide;auto-Kjeldahl's apparatus;automatic potentiometric titrator;glass distiller
摘  要:
A method using FOSS 2200 auto-Kjeldahl's apparatus coupled with Metrohm 809 automatic potentiometric titrator was developed to determine sulfur dioxide in preserved fruits.This method is simple,rapid and accurate and the whole process only needs 6 minutes.No significant difference (P > 0.05) between determination results obtained using Kjeldahl's apparatus and glass distiller for distillation was observed.The relative error of this method was lower than 0.94%.Average spike recovery rates for sulfur dioxide in 5 preserved fruits were between 90.39% and 103.40%,and the detection limit was 2.6 mg/kg.Therefore,this method is most suitable for determining sulfur dioxide in solid and liquid food samples.

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