Download PDF by J. Lawrynowicz, J. Lodz: Analytic Functions, Blazejewko 1982

By J. Lawrynowicz, J. Lodz

ISBN-10: 0387127127

ISBN-13: 9780387127125

Textual content: English, French

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Quantified on basis of 1 of 2 syn/anti oxime peaks. ) in the GC/MS analysis performed without synthesis of the PFBOA-derivatives. f. f. 71 55 95 92 mg L−1 ∗ acetaldehyde acetoin diacetyl 2,3-butanediol∗∗∗ 52 01 1 62 0 25 8 97 5 02 4 56 2 82 20 73 46 54 5 03 0 05 17 25 67 04 10 91 0 94 21 75 PEG/DVB fibre. In these conditions, the method shows good linearity, and sufficient accuracy and repeatability for all three compounds. GC/MS analysis of PFBOA-derivatives can be performed by either EI or chemical ionization.

De Revel, G. C. (1997) Occurrence of hydroxypropanedial in certain musts and wines, J. Agric. , 45(9), 3382–3386. , Marx, R. and Zimmer, M. (2001) RP-18+cationic exchange column, Lebensmittelchemie, 55, 32–34. H. T. (1991) Preparation of grapes and extraction of sugars and organic acids for determination by high performance liquid chromatography, Am. J. Enol. , 42(3), 237–244. , Seraglia, R. and Traldi, P. (2003) An effective derivatization method for quantitative determination of glyoxal and methylglyoxal in plasma samples by gas chromatography/mass spectrometry, Rapid Commun.

2002a). ; df 0 25 m) capillary column. 18). To distinguish the aliphatic saturated aldehydes from the unsaturated ones, signals at m/z 239 and 250 are recorded. The first one is typical of non -substituted compounds and probably corresponds to the N -vinyl pentafluorobenzyl oxime cation formed by 1-vinyl neutral aliphatic chain loss; the second is typical of unsaturated compounds and corresponds to the probable loss of the aliphatic radical chain with formation of the isoxazoline ring. 18 shows chromatograms relative to GC/MS-EI analysis of Cabernet Sauvignon wine recorded at m/z 181, 239 and 250 with schemes proposed for formation of the ions.

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Analytic Functions, Blazejewko 1982 by J. Lawrynowicz, J. Lodz

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