Water solubilization of ethanol and BTEX from gasoline: on-line monitoring by membrane introduction mass spectrometry

被引：55

作者：

Alberici, RM ^{[1
]}

Zampronio, CG ^{[1
]}

Poppi, RJ ^{[1
]}

Eberlin, MN ^{[1
]}

机构：

[1] State Univ Campinas, UNICAMP, Inst Chem, BR-13083970 Campinas, SP, Brazil

来源：

ANALYST | 2002年 / 127卷 / 02期

关键词：

D O I：

10.1039/b107222f

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The solubilization of ethanol and the aromatic hydrocarbons benzene, toluene and the isomeric ethylbenzene and xylenes (BTEX) in water in contact with commercial samples of ethanol-containing Brazilian gasoline was monitored on-line by membrane introduction mass spectrometry (MIMS) and BTEX and ethanol concentrations in water after prolonged contact were measured by flow injection analysis (FIA) coupled with MIMS (FIA-MIMS). The cosolvent effect of ethanol, which is known to increase BTEX solubility in water, was also found to speed up BTEX solubilization as compared with ethanol-free gasoline. The ethanol cosolvent effect was also compared with that of methyl tert-butyl ether (MTBE). Chemometric multivariate analysis applied to FIA-MIMS mass spectra of the ethanol-BTEX aqueous solutions formed after prolonged contact with gasoline samples showed that identical samples cluster closely whereas small variances in BTEX composition occurring among and within the three different types of ethanol-containing Brazilian gasoline are easily detected as they cause great dispersion in the chemometric plots.

引用

页码：230 / 234

页数：5

共 43 条

[1] Method for determination of methyl tert-butyl ether in gasoline by gas chromatography [J].

Achten, C ;

Püttmann, W .

JOURNAL OF CHROMATOGRAPHY A, 2001, 910 (02) :377-383

[2] Polyetherimide-silicone:: a 10 μm ultrathin composite membrane for faster and more sensitive membrane introduction mass spectrometry analysis [J].

Alberici, R ;

Sparrapan, R ;

Eberlin, MN ;

Windmöller, D ;

Augusti, R .

ANALYTICAL COMMUNICATIONS, 1999, 36 (06) :221-223

[3] Selective trace lever analysis of phenolic compounds in water by flow injection analysis - Membrane introduction mass spectrometry [J].

Alberici, RM ;

Sparrapan, R ;

Jardim, WF ;

Eberlin, MN .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2001, 35 (10) :2084-2088

[4]

*AM PETR I, 1985, PUBL AM PETR I, V4395

[5] MEMBRANE INTERFACE FOR SELECTIVE INTRODUCTION OF VOLATILE COMPOUNDS DIRECTLY INTO THE IONIZATION-CHAMBER OF A MASS-SPECTROMETER [J].

BIER, ME ;

COOKS, RG .

ANALYTICAL CHEMISTRY, 1987, 59 (04) :597-601

[6]

Brodskii ES, 1998, J ANAL CHEM+, V53, P1070

[7] FLOW-INJECTION SYSTEMS FOR SAMPLE INTRODUCTION IN MASS-SPECTROMETRY [J].

CANHAM, JS ;

PACEY, GE .

ANALYTICA CHIMICA ACTA, 1988, 214 (1-2) :385-390

[8] UV/H2O2 treatment of methyl tert-butyl ether in contaminated waters [J].

Cater, SR ;

Stefan, MI ;

Bolton, JR ;

Safarzadeh-Amiri, A .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2000, 34 (04) :659-662

[9] Analysis ob polar organic compounds using charge exchange ionization and membrane introduction mass spectrometry [J].

Cisper, ME ;

Garrett, AW ;

Cameron, D ;

Hemberger, PH .

ANALYTICAL CHEMISTRY, 1996, 68 (13) :2097-2101

[10] PARTITIONING OF AROMATIC CONSTITUENTS INTO WATER FROM GASOLINE AND OTHER COMPLEX SOLVENT MIXTURES [J].

CLINE, PV ;

DELFINO, JJ ;

RAO, PSC .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1991, 25 (05) :914-920

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