而硝酸盐和烟草生物碱含量与烟草特有亚硝胺无明显相关关系。

There is no relationship between alkaloids or nitrate and individual TSNAs.

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近年来，已有一些关于烟草生物碱检测方法的报道，它们包括气相色谱，液相色谱和毛细管电泳法等。

In recent years, some determination methods of tobacco alkaloids were reported, including gas chromatography, high-performance liquid chromatography and capillary electrophoresis etc.

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尼古丁是烟草中生物碱的主要成分，其生物学作用广泛。

Nicotine is a main component in tobacco, which has broad biological significance.

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