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烟草中烟碱含量的多少,是烟草质量的主要指标。目前,国内测定烟草中烟碱的方法,一般采用经典的水蒸汽蒸馏——硅钨酸重量法。此法准确度虽高,但分析花费时间长,测一个样需30小时。难于用在控制生产上。近年来一些单位采用紫外分光光度法,虽改重量测定为紫外分光光度测定,但提取烟喊仍沿用了水蒸汽蒸馏操作,且需用价格较贵的紫外分光光度计,在实际推广应用中也有困难。
The amount of nicotine in tobacco is a major indicator of tobacco quality. At present, the domestic determination of nicotine in tobacco methods, the general use of the classic steam distillation - silicotungstic acid gravimetric method. Although the accuracy of this method is high, but the analysis takes a long time, a sample of 30 hours. Difficult to use in the control of production. In recent years, some units using UV spectrophotometry, although the determination of the weight determination of UV spectrophotometry, but the extraction of tobacco is still used steam distillation operation, and the more expensive UV spectrophotometer, in the actual promotion and application of difficult.