Environmental screening by capillary gas chromatography combined with mass spectrometry and atomic emission spectroscopy

Degradation of Imidacloprid in Water by Photo-Fenton and TiO2 Photocatalysis at a Solar Pilot Plant: A Comparative Study

“…The feasibility of GC-AED analysis for detecting all the elements except helium makes it a very good choice for identification of unknown compounds and/or following TP evolution of the TPs during degradation processes. The combined use of AED/MS detection is one of the most powerful alternatives for unknowns ( , ). Figure illustrates the screening/identification strategy showing the evolution of the six TPs by selecting Cl, H, N, C, O, atoms.…”

Identification of non-target compounds using gas chromatography with simultaneous atomic emission and mass spectrometric detection (GC-AED/MS): analysis of municipal wastewater

“…Several studies have demonstrated that AED/MS detection is indeed a powerful technique in the analysis of unknowns. [1][2][3][4][5][6] However, in these studies, separate chromatographic systems were used for GC-MS and GC-AED data acquisition, while one important aspect of the use of complementary data, especially when analysing complex samples, is the distinct need for a very close correspondence of the retention times of both systems. For optimum results, the set-up of the two systems should be identical.…”

Data correlation in on-line solid-phase extraction-gas chromatography-atomic emission/mass spectrometric detection of unknown microcontaminants

“…Several authors used GC-AED to locate compound(s) containing a single hetero-atom in their GC traces, for subsequent correlation with MS. Pedersen-Bjergaard et al used GC-AED to detect Scontaining compounds, e.g. for the determination of sulphur compounds in pulp mill effluents [11] and for S-or Cl-containing compounds in marine sediment [12], and Deruaz et al for S-containing compounds in garlic [13]. However, none of these papers discussed how unambiguous correlation was obtained.…”

“…However, no confirmation of the resuits by an independent method was provided. A lack of sensitivity was mentioned for studies carried out at lower levels [12]. In this context, it will of course be highly desirable to focus attention on peaks representing compounds present in the samples at or above a predetermined threshold level of, typically, 0.1 or 1 pg L -1.…”