摘要
建立了快速测定酒精饮品中乙醇含量的衰减全反射．傅立叶变换红外光谱（ATR-FTIR）法。以ZnSe槽形板为ATR晶体，以水为背景采集样品的FTIR图。以1045cm^-1的C-OH伸缩振动为特征峰，用部分峰面积表示整个吸光度以消除肩峰干扰，分别建立了低浓度区（0—24％（WV））和高浓度区（24％-84％（V／V））两条标准曲线，其线性相关系数均大于0．999，乙醇水溶液的检测限为0．20％。对啤酒、干红葡萄酒以及白酒的分析表明，该方法准确、快速、方便，适用于酒精饮品中乙醇含量的快速测定。
A rapid method was developed to determine the ethanol content in alcoholic beverage based on attenuated total reflectance-Fourier transform infrared （ATR-FTIR） spectroscopy. The FTIR spectra were acquired by applying ZnSe trough plate as ATR crystal and water as the background. The stretching vibration of C-OH bond at 1045 cmt was used as the characteristic peak. The interference of the shoulder peak was ehminated by expressing the absorbance with partial peak area. Two calibration curves, corresponding to the low concentration region （ 0 - 24% （V/V） ） and high concentration region （ 24%- 84% （V/V） ）, were respectively founded with the correlation coefficients of more than 0. 999 and a limit of detection （LOD） of 0. 20% （V/V）. By analyzing beer,dry red wine and distilled spirit it indicates that this developed method is accurate,rapid and convenient and it can be applied in rapid determination of ethanol content in alcoholic beverages.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2009年第3期334-337,共4页
Chemical Research and Application
基金
北京化工大学青年教师自然科学研究基金(QN0728)
关键词
傅立叶变换红外光谱
衰减全反射
乙醇
酒精饮品
fourier transform infrared spectroscopy
attenuated total reflectance
ethanol
alcoholic beverage
