紫外光谱与红外光谱法对清热开音袋泡茶(Ⅱ)的质量分析

The quantity analysis of qingrekaiyin teabag(Ⅱ)by UV and FTIR

目的探讨清热开音袋泡茶(Ⅱ)的质量分析。方法采用紫外光谱法和傅立叶变换红外光谱法对我院的清热开音袋泡茶(Ⅱ)四批样品及一批对照样品进行质量分析。结果紫外光谱法所示,在三种溶液(蒸馏水,95%乙醇,石油醚)中的紫外吸收峰位置λmax的最大偏差(|Dmax|)分别为1.6、1.8和0.8,四批样品及对照样品最大吸收峰位置基本一致,无明显差异。四批样品及对照样品的红外光谱及红外一阶导数光谱形状很相似,红外光谱在3353 cm^(-1)、2926 cm^(-1)、1632 cm^(-1)、1418 cm^(-1)、1035 cm^(-1)、777 cm^(-1)、613 cm^(-1)附近有7个共有特征峰;红外一阶导数光谱在2926 cm^(-1)、2853 cm^(-1)、1741 cm^(-1)、1514 cm^(-1)、1464 cm^(-1)、1161 cm^(-1)、1107 cm^(-1)、1081 cm^(-1)、1031 cm^(-1)、991 cm^(-1)、777 cm^(-1)、610 cm^(-1)附近有12个共有特征峰。结论采用紫外光谱法能根据吸收度A值的高低较为准确地评价样品质量;采用傅立叶变换红外光谱法可以测定出样品成分的差别。两方法均专属性较强,重现性好,灵敏度高,可用于清热开音袋泡茶(Ⅱ)的质量分析。

Objective To analysis the quality of qingrekaiyin teabag （ Ⅱ ）.Methods The quality of four batches of samples and a group of control sample of qingrekaiyin teabag （Ⅱ） was analyzed by the method of ultraviolet spectroscopy （UV） and fourier transform infrared spectroscopy （FTIR）.Results UV showed that the maximum deviation of UV absorption peaks were 1.6, 1.8 and 0.8 in three kinds of solvents （distilled water, 95% ethanol and petroleum ether）.The position of the maximum absorption peaks were basically consistent of four batches of samples and the control sample,and there were no significant difference.The infrared spectrum and infrared first derivative spectra were similar in shape of four batches of samples and the control sample.There were 7 common characteristic peaks of infrared spectrum,in 3353 cm-1,2926 cm-1,1632 cm-1,1418 cm-1,1035 cm-1,777 cm-1,613 cm-1 respectively.There were 12 common characteristic peaks of infrared first derivative spectra,in 2926 cm-1,2853 cm-1,1741 cm-1,1514 cm-1,1464 cm-1, 1161 cm-1,1107 cm-1,1081 cm-l,1031 cm-l,991 em-1,777 cm-l,610 cm-1 respectively.Conclusion UV is used to evaluate the quality of the samples accurately,according to absorption degree （A）;FTIR can be used to measure out the differences between the composition of the sample.Both methods had strong specificity,good reproducibility, high sensitivity, and can be used to analysis the quality of qingrekaiyin teabag （ Ⅱ ）.