Abstract
Automated determination ofhydrogen cyanide acroleinand total aldehydes in the gasphase of tobacco smoke
Highlights
For some time there has been wordwide concern for the health risks of cigarette smoking
Individual automated colorimetric methods have been published for hydrogen cyanide (HCN), acrolein and total aldehydes using AutoAnalyser II techniques; the simultaneous determination of all three from a single sample has not been attempted due, in part, to the fact that different gas scrubbing agents and diluents must be used for each analyte
Selection of a single efficient scrubbing agent and the introduction of on-line dilution facilitate the simultaneous determination of the amount of HCN, acrolein and total aldehydes delivered by various brands of cigarettes
Summary
Figure is a representation of the manifold used for simultaneously measuring the three analytes. The twin sampling probe incorporated in the sampler is used to deliver the sample stream to the manifold. One probe delivers the sample for the acrolein analysis whilst the other supplies a two-way stream splitter from which a sample is drawn for determination of HCN and total aldehydes. On-line mixing and sub-sampling must be carried out effectively and reproducibly. Simple use of coloured solutions enables the efficiency of the mixing assembly, shown, to be checked visually. Since there is a tendency for air introduced on sample switching to become trapped in the sub-sampling well, bubbles must be removed prior to this point as illustrated in figure 2. Rickert & Stoekwell Automated determination of hydrogen cyanide etc
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