The standard procedure to determine water and nicotine in tobacco smoke is gas chromatography with two packed columns for the separation. The analysis time is between 4 and 6 minutes. The quality of packed columns is variable from one production to another and ghost peaks are even present on some occasions (hand-made preparation by supplier). To eliminate this problem, capillary columns were evaluated to perform routine water and nicotine determinations in tobacco smoke. Capillary columns are produced by machine and are less variable to production. The goal of this method improvement was to use the same standard concentrations, internal standards and only 1 injection for both columns by the use of an injector splitter. The procedure was optimized to reduce the analysis time. Finally, same or better method characteristics such as LOQ and separation system robustness. Results are not statistically different with packed or capillary columns (t-_test, P₉₅,) under ISO and Canadian Intense smoking regimes. The chromatogram is very simple and is acquired with the TCD for water for the first minute and then changed for the FID for the last portion of it. This approach has the advantage to reduce the disk space for data storage and to generate only 1 chromatogram which minimize the time for the data processing. The analysis time was reduced to less than 2 minutes. The Limits of Quantitation are 0.2 and 0.3 mg/cig for water and 0.05 and 0.03 mg/cig for nicotine with packed and capillary columns respectively.