Christie’s Custom Blended Pipe Tobaccos are all one hundred percent natural tobaccos. Stock solution (0.2 mg/ml) of nicotine and metronidazole (internal standard) were prepared by dissolving accurately weighed quantities of pure compounds separately in distilled water. The stock solution remained stable for more than a month when stored at -20°C. Working standard solutions of nicotine… Continue reading Captain Black Tobacco Best Selling Pipe Tobacco