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Photograph of the reference product* (left) and the common smokeless tobacco Afzal (right) samples. These samples were analysed via high-performance liquid chromatography-tandem mass spectrometry to determine tobacco-specific nitrosamine levels.
*American moist snuff product purposely manufactured for laboratory analysis by the Tobacco and Volatiles Branch of the Division of Laboratory Sciences at the Centers for Disease Control and Prevention (Atlanta, Georgia, USA).
