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The experiment of separating low toxic n-hexane and cyclohexane by traditional gas chromatography was improved with orthogonal experimental design. The effect of sample quantity, vaporization chamber temperature, detector temperature, column temperature, line velocity and separability of the split ratio were examined. Through the experiment, students could understand the use and maintenance of gas chromatography instruments. At the same time, they could understand separability and column efficiency of chromatography. 相似文献
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长白山地区几种红景天品种的傅里叶变换红外光谱法鉴别研究 总被引:8,自引:3,他引:5
分别用石油醚,氯仿,甲醇对长白山地区的野生和栽培高山红景天和长白红景天进行了提取,并首次对提取物进行了傅里叶变换红外光谱法测定,还用红景天块做了相应的验证研究。结果表明,长白山地区的野生和栽培高山红景天和长白红景天的红外光谱图谱有明显不同,故可用作鉴别其品种或评价其质量的一种手段。 相似文献
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