激光拉曼光谱内标法直接测定乙醇浓度  

Direct Determination of Ethanol by Laser Raman Spectra with Internal Standard Method

作　　者：刘文涵[1] 杨未[1] 吴小琼[1] 林振兴[2] 

机构地区：[1]浙江工业大学化材学院,杭州310032 [2]宁波出入境检验检疫局,宁波315012

出　　处：《分析化学》2007年第3期416-418,共3页Chinese Journal of Analytical Chemistry

基　　金：浙江省分析测试基金(No.04128);浙江省重中之重实验室开放基金资助项目

摘　　要：采用激光拉曼光谱对醇类样品中的乙醇含量进行直接测定。通过不同浓度乙醇的拉曼光谱特征峰（CCO面内伸缩振动884cm^-1）与本底水峰组成相对强度比,建立线性回归方程,结果表明,线性范围为4%-40%,线性相关系数为0.9975;检出限为1.02%;回收率为82.0%-105.0%。对白酒、清酒、杨梅酒和医用酒精棉进行了测定,其乙醇平均浓度分别为36.1%、15.5%、23.7%和79.1%;RSD分别为0.22%、1.75%、2.49%和2.76%。此方法具有快速、简便、直接、绿色、对样品无损等优点,适用于白酒类、医用酒精等乙醇含量的检测。Immediate quantitative analysis of ethanol using internal standard by laser Raman studied. Good linear correlation between the intensity ratios of the 884 cm^-1（the -CCO spectra has been band of ethanol） to the 3200 cm^-1 （band of water） and concentration of ethanol was obtained. The linear range of ethanol concentration are 4% -40% , the correlation coefficient was 0. 9975, the detection limit of ethanol is 1.02%. The method has been used to determine distilled spirit, wikipedia, waxberry vino and alcohol cotton, the results show the alcohol concentration are 36.14% , 15.50% ,23.71% ,79.10% , and the RSD are 0. 2% , 1.8%, 2.5% and 2.8% , respectively. Non-destructive, non-intrusive nature of the method makes internal standard-laser Raman spectra as a convenience, accurate quantitative analysis method for ethanol.

关 键 词：激光拉曼光谱 乙醇 内标法 酒类 

分 类 号：O657.3[理学—分析化学]