| 三乙醇胺吸收-盐酸副玫瑰苯胺分光光度法测定白砂糖中的二氧化硫 |
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| 引用本文： | 余娟,卢家炯,郭剑雄. 三乙醇胺吸收-盐酸副玫瑰苯胺分光光度法测定白砂糖中的二氧化硫[J]. 甘蔗糖业, 2009, 0(1) |
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| 作者姓名： | 余娟 卢家炯 郭剑雄 |
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| 作者单位： | 广州甘蔗糖业研究所检测中心,广东省甘蔗改良与生物炼制重点实验室,国家糖业质量监督检验中心,广州,510316;广西大学轻工与食品工程学院,南宁,530004 |
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| 摘 要： | 本文建立了用三乙醇胺吸收—盐酸副玫瑰苯胺分光光度法测定白砂糖中二氧化硫的方法。该法用三乙醇胺代替汞盐,减少了对环境的污染。样品经处理后中加入三乙醇胺吸收液,溶液中的二氧化硫能与三乙醇胺生成稳定的阴离子复合物,再与盐酸副玫瑰苯胺溶液和甲醛反应生成紫红色化合物,在579nm处测定其吸光度。白砂糖中二氧化硫浓度在0～60mg/kg范围内与吸光度值呈良好的线性关系(r=0.9994),检出限为0.50mg/kg。样品测定的相对标准偏差3.1%～4.8%,回收率93.3%～97.6%。与国标方法测定结果比较,两者无显著性差异,结果令人满意。
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| 关 键 词： | 三乙醇胺 盐酸副玫瑰苯胺 白砂糖 二氧化硫 |
Determination of Sulfite in White Granulated Sugar by Triethanolamine Sampling-pararosaniline Hydrochloride Spectrophotometry |
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| YU Juan,LU Jia-jiong,GUO jian-xiong. Determination of Sulfite in White Granulated Sugar by Triethanolamine Sampling-pararosaniline Hydrochloride Spectrophotometry[J]. Sugarcane and Canesugar, 2009, 0(1) |
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| Authors: | YU Juan LU Jia-jiong GUO jian-xiong |
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| Affiliation: | 1.China Sugar Inspection Center;Guangzhou;510316 Guangdong Key Lab. of Sugarcane Improvement and Biorefinery;2. Light Industry and Food Engineering College;Guangxi University;Nanning;530004; |
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| Abstract: | A new method was established to determine sulfite in white granulated Sugar by triethanolamine sampling-pararosaniline hydrochloride spectrophotometry, by using triethanolamine instead of mercuriate, the environmental pollution was less. Sulfur dioxide in samples reacted with triethanolamine to form steady compound. Adding formaldehyde, the compound reacted with pararosaniline hydrochloride to produce one purple red compound, which was determined by spectrophotometry at 579 nm. This method had good linearit... |
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| Keywords: | Pararosaniline hydrochloride spectrophotometric method Formaldehyde White granulated Sugar Sulfur dioxide |
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