<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The possibility of determining the water content of cigarette smoke condensate by the absorption in the near infra-red is already known. The most promising of the methods hitherto published has been improved in an essential step. The smoke condensate is dissolved in tetrachloromethane containing 10 percent by volume of methanol. The differential absorbance of the smoke solution between the wave lengths 1.850 and 1.875 micron is proportional to its water content. The method has a precision of ± 0.5 mg of water (95 percent confidence limits) for a total amount of 10 to 50 mg of water per 25 ml of solution. The accuracy and specifity of the method are assured. The experimental variables are not critical - except the composition of the solvent which must be maintained accurately - and the analytical procedure is, therefore, rapid, reproducible and simple. </p></abstract>

The possibility of determining the water content of cigarette smoke condensate by the absorption in the near infra-red is already known. The most promising of the methods hitherto published has been improved in an essential step. The smoke condensate is dissolved in tetrachloromethane containing 10 percent by volume of methanol. The differential absorbance of the smoke solution between the wave lengths 1.850 and 1.875 micron is proportional to its water content. The method has a precision of ± 0.5 mg of water (95 percent confidence limits) for a total amount of 10 to 50 mg of water per 25 ml of solution. The accuracy and specifity of the method are assured. The experimental variables are not critical - except the composition of the solvent which must be maintained accurately - and the analytical procedure is, therefore, rapid, reproducible and simple.

Determination of the Water Content of Cigarette Smoke Condensate by Near Infra-red Spectrophotometry / Bestimmung des im Rauchkondensat enthaltenen Wassers durch Spektrophotometrie im nahen Infrarot

Vereinigte Tabakfabriken AG, Neuchâtel-Serrières, Switzerland

Contributions to Tobacco & Nicotine Research

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

The possibility of determining the water content of cigarette smoke condensate by the absorption in the near infra-red is already known. The most promising of...

Determination of the Water Content of Cigarette Smoke Condensate by Near Infra-red Spectrophotometry / Bestimmung des im Rauchkondensat enthaltenen Wassers durch Spektrophotometrie im nahen Infrarot

Publié en ligne: 28 mai 2014

Pages: 39 - 50

DOI: https://doi.org/10.2478/cttr-2013-0054

© Beiträge zur Tabakforschung International

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.