Short Capillary Traps in GC–GC Tandem Systems for Direct Analysis of T2 Mycotoxin in Aqueous Samples |
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Authors: | M V Russo E Veschetti G Cinelli P Avino |
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Institution: | (1) Facoltà di Agraria (DISTAAM), Università degli Studi del Molise, Via De Sanctis, 86100 Campobasso (CB), Italy |
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Abstract: | Two-metre long pieces were cut from a 25-m long fused silica GC column with an inner diameter of 300 μm and a film thickness
of 1.2 μm 5% phenyl polymetyhylsiloxane and used as traps to extract T2 mycotoxin from aqueous solutions. Water samples were
pushed through the traps at various velocities using nitrogen, then rinsed and dried. The traps were installed in a PTV accessory
within a GC oven with 5 cm of the outlet outside the oven. The portion of the trap within the oven was heated and the analyte
was focused on the short piece outside the oven. The focused solute was then thermally desorbed and separated into another
25-m long capillary column installed in a second GC and directly coupled to the trap outlet (GC–GC tandem system). The recovery
of the analyte was nearly quantitative and independent of sample salinity and experimental conditions set in the trapping
operation. |
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Keywords: | Gas chromatography GC– GC tandem system Capillary-trap sampling Analyte focusing T2 mycotoxin |
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