Use of 2,2-dimethoxypropane for the direct gas chromatographic-mass spectrometric determination of some organic compounds in water |
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Authors: | Alberto Sturaro Lucio Doretti Giorgio Parvoli |
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Affiliation: | Servizio di Sicurezza del Lavoro e Protezione Sanitaria del CNR, Corso Stati Uniti 4, I-35020 Padova Italy |
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Abstract: | The well known reaction between 2,2-dimethoxypropane and water allows for the conversion of an aqueous into an organic solution ready to be injected directly into a gas chromatographic-mass spectrometric (GC-MS) system. Only time, temperature and water/ketal ratio were the parameters studied among those which influence the equilibrium reaction. The reaction environment is not suitable for all compounds: acids, esters, alcohols, amines, ketones and phenols may react with methanol, acetone and ketal owing to Amberlyst being present as catalyst. This method is proposed for the GC-MS analysis of aqueous solutions containing hydrocarbons, halogenated hydrocarbons and ethers. The determination of some pesticides in water is reported. |
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Keywords: | Gas chromatography Mass spectrometry Water Pesticides |
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