ISSN:
1618-2650
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Summary A review is given of the mechanism of the Stenhouse-reaction (SR) of arylamines with furfural and of its qualitative and quantitative analytical applications. A number of factors, which influence the use of the SR for the colorimetric determination of furfural in Tollens-distillates are discussed in the experimentical part. It was found, that the addition of stannous chloride not only stabilises the SR-colour but also catalyses the SR itself. The presence of aldehydes other than furfural in Tollensdistillates, primarily has a negative influence on the SR of furfural. Spectral overlapping by reaction products from these aldehydes is less important. Aniline, p-anisidine and p-bromaniline were found to be the most suitable of the arylamines studied. The SR with aniline is fairly sensitive and moderately susceptible to interference. The SR with p-anisidine is highly sensitive but more liable to interference. The SR with p-bromaniline has normal sensitivity and follows Beer's law more exactly; its use is, however, limited by the extreme negative influence of formaldehyde.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00456213
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