Detection of malathion by the CO₂ laser: Potentials and limitations

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• 作者：Dubravka S. Maravić ; Milan S. Trtica ; Š ; ć ; epan S. Miljanić ; and Bojan B. Radak
• 刊名：Analytica Chimica Acta
• 出版年：2006
• 出版时间：12 January 2006
• 年：2006
• 卷：555
• 期：2
• 页码：259-262
• 全文大小：111 K

文摘

Possibilities of on-line non-contact detection of the vapour of the commercially available pesticide malathion by the CO₂ laser were investigated, using a photoacoustic technique developed in our laboratory. A set of laser/vapour spectral coincidences in the usual range of CO₂ laser wavelengths were obtained, the samples being: the commercial product Etiol available on the market, solvent, emulsifiers, and neat malathion, all with air added to a mid-pressure of about 100 mbar and to atmospheric pressure. Relative contributions of the components in the product are discussed. A detection limit of 0.002 vol. % of the product in air was estimated.