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- W2049945986 abstract "A new procedure has been developed for the simultaneous flow analysis Fourier transform infrared (FTIR) determination of benzene, toluene and methyl t-butyl ether (MTBE) in real petrol samples. The method is based on the dilution of samples in hexane (1 + 9) and direct injection of 300 µl of the diluted samples into a 0.28 ml min–1 carrier flow of hexane. First-order derivative absorbance measurements are carried out by FTIR, in the wavenumber range 1350–400 cm–1. The three compounds studied were determined simultaneously in the same sample without additional sample preparation. Benzene was determined by measurement of the first order derivative (dA/d, where A is the absorbance, and , the wavenumber) between the peak at 678 cm–1 and the valley at 672 cm–1 with a dynamic range between 0.005 and 0.8% v/v, being established as the limit of detection for a probability level of 99.6%. Toluene was determined by measuring dA/d between 731 and 725 cm–1, the dynamic range being from 0.01 to 2.0% v/v. Methyl t-butyl ether was determined by measuring dA/d between 1209 and 1201 cm–1, providing a dynamic range between 0.035 and 2% v/v. The method can be applied to the direct analysis of petrol; the results obtained in the determination of the three compounds in real samples agree with those found by gas chromatography." @default.
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- W2049945986 title "Simultaneous flow analysis Fourier transform infrared determination of benzene, toluene, and methyl t-butyl ether in petrol" @default.
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- W2049945986 doi "https://doi.org/10.1039/an9941900653" @default.
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