Large-volume PTV injection: Comparison of direct water injection and in-vial extraction for GC analysis of triazines

Abstract

SummaryThe potential of large-volume PTV injection was studied for the analysis of triazine herbicides in water sampies. Direct water injection and in-vial extraction were described and compared. Detection limits were between 0.01-0.02 gg L -1 and relative standard deviations were < 9 %. Both methods are suitable for the analysis of triazines at ppt-level, although in-vial extraction is favourable for water samples with relatively large amounts of matrix components.

Large-volume injection combined with gas chromatography/isotope ratio mass spectrometry for the analysis of polycyclic aromatic hydrocarbons

“…vapor‐overflow, loop‐type injection or on‐column injection . Using Large‐Volume Injection (LVI), not only large amounts of organic solvents can be introduced to the injector, but also aqueous solutions …”

The selection of the standard phase (gas vs. liquid) and the related matrix effect on the direct injection gas chromatographic analysis of VOCs at sub–ppm levels

“…and 2 m of a HP5 column (0.53 mm, 1 μm film thickness) with direct connection with the analytical column (Vecera et al, 2005). Other options like temperature programmable injectors (PTV) or derivatization can also be an alternative option to remove or suppress those limitations (Mol et al, 1995;Teske et al, 1998;Norlock et al, 2002;Hoh and Mastovska, 2008;Li et al, 2009). …”

Multiresidue method for the control of pesticide residues in tomatoes and derived products

“…In recent years, a decrease of these MRLs in many pesticides has led to research to improve the limits of detection of the available analytical methods for the analysis of pesticides. As improvement in detection is needed, GC-MS-MS with large volume injection (LVI) techniques [29][30][31] and different ionization modes, electronic ionization (EI) and chemical ionization (CI), to increase the sensitivity for each pesticide, have been proposed. MRMs based on liquid-liquid extraction with organic solvents are the more frequently used.…”