Detection and Discrimination of Phenol and Primary Alcohols in Water Using Electronic Noses

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• 作者：Virginia Diz ; Miryan Cassanello ; R. Martin Negri
• 刊名：Environmental Science & Technology
• 出版年：2006
• 出版时间：October 1, 2006
• 年：2006
• 卷：40
• 期：19
• 页码：6058 - 6063
• 全文大小：299K
• 年卷期：v.40,no.19(October 1, 2006)
• ISSN：1520-5851

文摘

Electronic nose methodology was used for discriminatingbetween samples of n-primary alcohols and phenol inwater. An electronic nose device developed at our laboratorywas applied to detect the vapors from the samples. Thedevice consists of 10 nonspecific gas sensors based on tin-dioxide, whose electrical conductivity change whenexposed to the vapors. The whole set of responsesconstitutes a fingerprint associated with the sample forthe particular array of sensors. Using this method, we coulddifferentiate among n-primary alcohols, pure phenol, andaqueous dilutions of phenol. Dilutions of primary alcoholsand phenol of 1, 3, 5, and 10% (v/v) were assayed. Thefingerprints of the dilutions are similar to that of the respectivepure (not diluted) alcohol, but with lower signal intensities.Principal component analysis and cluster analysis wereperformed in order to explore the feasibility of discriminatingamong the samples. Dilutions of phenol were successfullydiscriminated from those of primary alcohols. Discriminationof n-octanol and n-decanol from the other alcohols, includingphenol, was also achieved. The results suggest that it ispossible to discriminate among dilutions of phenol in waterand to give an approximate gross estimation of phenolconcentration in water.