比值导数法对乙二醛和乙醛酸的二元混合物分析  

Analysis of mixture of glyoxal and glyoxalic acid by derivative ratio

作　　者：牛宇岚[1] 

机构地区：[1]太原工业学院化学工程系,山西太原030008

出　　处：《应用化工》2007年第10期1024-1026,共3页Applied Chemical Industry

基　　金：山西省科学技术发展计划项目(2007031137)

摘　　要：用紫外光谱的比值导数法对乙二醛与乙醛酸的二元混合物进行分析,该方法能将乙二醛和乙醛酸重叠光谱分开并消除互相干扰,从而方便的完成两组分混合体系中各组分的测定。并对比值导数法的影响因素进行了分析说明。确定了最佳检测条件：肟化反应中乙二醛和乙醛酸的质量比〉0.58,反应温度50℃,反应时间20 min,肟化剂用量1.0 mL。乙二醛、乙醛酸的检测下限分别为0.209,0.890 mg/L。乙二醛和乙醛酸的回收率分别达到96%～99.5%和97%～103%。The derivative ratio of UV spectrum is used to analyze a mixture of glyoxal and glyoxalic acid. This method can separate overlap spectra and eliminate interference, so that the components in a two-component mixture system are effectively measured. The factors affecting the derivative ratio are analyzed and explained. The optimum condition of detection are that： the quality ratio of glyoxal to glyoxalic acid is more than 0, 58, reaction temperature is 50 ℃, reaction time is 20 min, and the use level of oxime dose is 0. 1 mL,the lowest amount of glyoxal and glyoxalic acid is 0, 209 mg/L and 0, 890 mg/L. The recoveries for glyoxal and glyoxalic acid are 96% ～99.5% and 97% ～ 103% respectively.

关 键 词：乙二醛 乙醛酸 比值导数法 肟化反应 

分 类 号：TQ657.3[化学工程—精细化工]