Related Products of 494-52-0. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: (S)-3-(Piperidin-2-yl)pyridine, is researched, Molecular C10H14N2, CAS is 494-52-0, about Simultaneous determination of six alkaloids in tobacco and tobacco products by direct analysis of real-time triple quadrupole mass spectrometry with a modified pretreatment method. Author is Li, Chao; Li, E’xian; Ma, Ming; Liu, Xiuming; You, Junheng; Wu, Yiqin; Jiang, Wei; Liu, Zhihua; Qin, Yunhua.
In order to determine six alkaloids (mass fraction) of nicotine, nornicotine, myosmine, anatabine, anabasine, and nicotyrine in tobacco and tobacco products quickly, accurately, and simultaneously, a novel method based on direct anal. of real-time model in situ ionization technique combined tandem mass spectrometry with a modified sample pretreatment was established, in which exptl. parameters such as the type and amount of extraction solvent and injection rate were optimized, resp. The samples of five com. cigarettes and five kinds of tobacco leaves were analyzed by the established method, and the determined values were compared with those obtained using a gas chromatog. with mass spectrometry method: (1) Under optimized conditions (30 mL ultrapure water as extraction solvent and with extraction rate of 0.6 mm/s), anal. could be completed within 10 min. (2) The linear range of the method was 0.002-2000μg/g with R2=0.9957, the recovery ranged from 86.8 to 105.6%, and the limit of detection and the limit of quantification were 0.004-0.835μg/g and 0.013-2.787μg/g, resp. (3) The relative standard deviation between direct anal. of real-time method and the gas chromatog. with mass spectrometry method was 0.34-8.83%. The established method is rapid, reliable, and suitable for the ultrafast determination of six alkaloids in tobacco and tobacco products.
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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI