摘要
本研究对盐酸副玫瑰苯胺法测定食品中SO2进行改进,以EDTA-2Na代替剧毒试剂四氯汞钠,建立了超声波浸提、无汞盐吸收液检测干果SO2残留的方法,二氧化硫含量在0～10.0μg范围内与吸光度呈良好的线性关系(R2=0.9995),方法的检出限为0.8mg/kg。测定样品的相对标准偏差在3.29%～7.42%之间,回收率在89.17%～104.72%之间。该方法操作简便、重现性好、线性范围宽、减小了对环境的污染,可用于干果中亚硫酸盐的测定。
A rapid determination method of sulfur dioxide （SO2） residues in nut fruits by an improved pararosaniline hydrochloride colorimetry combined with ultrasonic-assisted mercury-free reagent extraction was developed. In order to extract SO2 residues effectively from samples, accelerative ultrasonic extraction was performed in EDTA-2Na solution instead of Na2HgCl4 which has been widely used. This method has a good linearity（R^2 = 0.9995）for the concentration of sulfur dioxide ranging from 0 to 10 μg, and its detection limit is 0.8 mg/kg. The average spike recoveries of SO2 in different nut fruit samples are between 89.17% and 104.72% with the RSD of 3.29% to 7.42%. This method has good repeatability and causes less pollution. Therefore, it is suitable for the determination of sulfite in nut fruits.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2009年第8期247-250,共4页
Food Science
基金
北京市科委项目(Z07090500550702)
关键词
亚硫酸盐
二氧化硫
盐酸副玫瑰苯胺
乙二胺四乙酸二钠
干果
sulfite
sulfur dioxide
pararosaniline hydrochloride
ethylenediamine tetraacetic acid disodium
nut fruits
