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投稿时间：2016-11-10
投稿时间：2016-11-10
中文摘要: 建立浊点萃取预富集分光光度法测定食品中痕量钒的新方法。 在酸性介质中， 以 N-苯甲酰-N-苯基羟胺 （N-Benzoyl-N-Phenylhydroxylamine，BPHA）为配位剂，非离子表面活性剂 Triton X-114 为萃取剂，分离富集溶液中痕量
钒。详细考察溶液酸度、配位剂和表面活性剂用量、反应时间、平衡温度和平衡时间等条件对浊点萃取效果的影响。最 佳试验条件下，方法的线性范围为 5.0 μg/L～800 μg/L（r=0.999 7），检出限为 0.62 μg/L，加标回收率在 98.0 %～103.5 %之 间，相对标准偏差在 1.9 %～3.4 %之间。已成功应用于大米、决明子茶等实际样品分析。
Abstract:A new method for the determination of trace vanadium in food samples by spectrophotometric after cloud point extraction was proposed. In acid medium， N-Benzoyl-N-Phenylhydroxylamine （BPHA） was used as a coordination agent， Triton X-114 was selected as extraction， separation and enrichment of trace vanadium in solution. The effects of experimental conditions such as acidity， concentration of coordination agent and sur－ factant， reaction time， equilibration temperature and time on cloud point extraction were discussed. Under the optimum conditions， a good linear relationship was obtained in the range of 5.0 μg/L-800 μg/L of the vanadium （r=0.999 7）， the detection limits of 0.62 μg/L. The recoveries fell in the range from 98.0 % to 103.5 % and the relative standard deviations were between 1.9 % and 3.4 %. This method has been applied for the determination of vanadium in real samples such as rice and cassia seed with satisfactory results.
文章编号：201708025 中图分类号： 文献标志码：A
基金项目:湖北省教育厅科学技术研究项目（Q20126002）；汉江师范 学院重点科研项目（2015A01）
| Author Name | Affiliation |
| DING Zong-qing， CAO Jun | Department of Biology， Chemistry and Environmental Engineering， Hanjiang Normal University，Shiyan 442000， Hubei， China |
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