A suitable technique for the qualitative and semiquantitative analysis of tobacco ash by spark source mass spectrography has been developed. Several techniques of sample handling and data reduction were evaluated. An optimum set of conditions was
Acetal formation in conjunction with ultraviolet spectrophotometry has been employed as a convenient and useful analytical tool for the characterization and determination of aldehydes. The ultraviolet spectra of acetals formed from aldehydes in solutions of acidified methanol are significantly different from the spectra of the parent alde-
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