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首页> 外文期刊>Journal of Agricultural and Food Chemistry >A simplified spectrophotometric method for routine analysis of saccharin in commercial noncaloric sweeteners.
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A simplified spectrophotometric method for routine analysis of saccharin in commercial noncaloric sweeteners.

机译：一种简化的分光光度法，用于常规分析市售无热量甜味剂中的糖精。

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摘要

A simple, rapid, and sensitive spectrophotometric method for routine analysis of saccharin in commercial noncaloric sweeteners is proposed. This method is based on the reaction of saccharin with tetrachloro-p-benzoquinone (p-chloranil) accelerated by hydrogen peroxide and conducted in an ethanol:acetone (4:1) medium, producing a violet-red compound (lambda(max) = 550 nm). Beer's law is obeyed in a concentration range of 2.05 x 10(-)(4) to 3.00 x 10(-)(3) M with an excellent correlation coefficient (r = 0.9998). The detection limit was 1.55 x 10(-)(5) M, and the effect of interferences on the spectrophotometric measurements was evaluated. The proposed procedure was applied successfully to the determination of saccharin in noncaloric sweeteners. Recoveries were within 99.2-104.3% with standard deviations ranging from to 0.5-1.6%. Results of the proposed method compare very favorably with those given by the high-performance liquid chromatography method recommended by the Food and Drug Administration.
机译：提出了一种简单，快速，灵敏的分光光度法，用于商业非热量甜味剂中糖精的常规分析。此方法基于糖精与过氧化氢加速的四氯对苯醌（p-chloranil）反应，并在乙醇：丙酮（4：1）介质中进行，生成紫红色化合物（lambda（max）= 550 nm）。在2.05 x 10（-）（4）至3.00 x 10（-）（3）M的浓度范围内遵循比尔定律，且相关系数极佳（r = 0.9998）。检出限为1.55 x 10（-）（5）M，并评估了干扰对分光光度法测量的影响。所提出的方法已成功应用于非热量甜味剂中糖精的测定。回收率在99.2-104.3％之内，标准偏差范围为0.5-1.6％。拟议方法的结果与美国食品药品监督管理局推荐的高效液相色谱法给出的结果相比非常有利。

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