| 结晶紫-紫外分光光度法测定食品中糖精钠的含量 |
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| 引用本文： | 焦嫚,董学芝,胡卫平,张蕾,王鑫.结晶紫-紫外分光光度法测定食品中糖精钠的含量[J].光谱实验室,2010,27(1):287-290. |
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| 作者姓名： | 焦嫚 董学芝 胡卫平 张蕾 王鑫 |
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| 作者单位： | 河南大学化学化工学院污控研究所,河南省开封市西开发区金明大道,475004 |
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| 摘 要： | pH7.0的Britton-Robinson(B-R)缓冲溶液中,结晶紫在250nm波长处有最大吸收,少量糖精钠的存在可使结晶紫在该波长处的吸收峰显著增强。在0.008-44μg/mL范围内,体系的吸光度的增强与糖精钠浓度呈良好的线性关系(r=0.9994),检出限为0.004μg/mL,回收率在98.1%-108.3%之间,该法用于食品中糖精钠含量的测定,与国标法(高效液相色谱法)对照,结果满意。
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| 关 键 词： | 糖精钠 结晶紫 紫外分光光度法 |
Determination of o-Sufobenzoic Acid Imide(Na) in the Food by UV Spectrophotometry |
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| JIAO Man,DONG Xue-Zhi,Hu Wei-Ping,ZHANG Lei,WANG Xin.Determination of o-Sufobenzoic Acid Imide(Na) in the Food by UV Spectrophotometry[J].Chinese Journal of Spectroscopy Laboratory,2010,27(1):287-290. |
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| Authors: | JIAO Man DONG Xue-Zhi Hu Wei-Ping ZHANG Lei WANG Xin |
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| Affiliation: | Pollution Control Institute;College of Chemistry and Chemical Engineering;Henan University;Kaifeng;Henan 475004;P.R.China |
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| Abstract: | In pH 7.0 Britton-Robinson(B-R)buffer solution,the absorbance of crystal violet at 250nm was enhanced by the o-sufobenzoic acid imide(Na)markedly.There is a good linear relationship in the range of 0.008-44vg/mL(r=0.9994)between the o-sufobenzoic acid imide(Na)concentration and absorbance.The detection limit is 0.004μg/mL,the average recovery is between 98.1%-108.3%.It has been used to the determination of o-sufobenzoic acid imide(Na)in food,compared with HPLC,and the results are satisfactory. |
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| Keywords: | o-Sufobenzoic Acid Imide(Na) Crystal Violet:UV Spectrophotometry |
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