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Title of Journal: Anal Bioanal Chem

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Abbravation: Analytical and Bioanalytical Chemistry

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Springer-Verlag

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10.1016/j.ab.2009.08.002

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1618-2650

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Comparison of two solidphase microextraction meth

Authors: Virginie Larroque Valérie Desauziers Pierre Mocho
Publish Date: 2006/09/06
Volume: 386, Issue: 5, Pages: 1457-1464
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Abstract

Competitive adsorption on adsorptive solidphase microextraction SPME fibres implies careful determination of operating conditions for reliable quantitative analysis of VOCs in indoor air With this objective two analytical approaches involving nonequilibrium and equilibrium extraction were compared The average detection limit obtained for GCMS analysis of nine VOCs by the equilibrium method is 02 μg m−3 compared with 19 μg m−3 with the nonequilibrium method The effect of the relative humidity of the air on the calibration plots was studied and shown to affect acetone adsorption only Hence the concentrations that can be accurately determined are up to 9 μmol m−3 The methods were then applied to indoor air containing different concentrations of VOCs The nonequilibrium method involving short extraction time can be used for detection of pollution peaks whereas equilibrium extraction is preferable for measurement of subμg m−3 ground concentration levels

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