title: Coupling needle trap devices with gas chromatography-ion mobility spectrometry detection as a simple approach for on-site quantitative analysis.
abstract: This study presents needle trap device (NTD) coupled with a portable gas chromatography-ion mobility spectrometry detection system (NTD-GC-IMS) as an advantageous, simple, cheap and reliable approach for on-site quantitative analysis. The NTD-GC-IMS system was evaluated using α-pinene, limonene and acetone as analytical models. Results showed satisfactory response stability (intra and inter-day relative standard deviation (RSDs)<10%), as well as limits of detection (LODs) comparable to those provided by conventional benchtop instruments (LODs<0.7ng). Additionally, this methodology, together with solid phase microextraction (SPME-GC-IMS), was successfully used for on-site monitoring of temporal emissions of α-pinene by a pine branch at different times during the same day. Quantitative analysis was satisfactorily accomplished in a significantly short period of time (330s) owing to the low detection limits that IMS detection provides.
authors.affiliation: Department of Chemistry, University of Waterloo, Ontario, Canada N2L 3G1.
authors.forename: Nathaly
authors.initials: N
authors.lastname: Reyes-Garcés
authors.forename: German Augusto
authors.initials: GA
authors.lastname: Gómez-Ríos
authors.forename: Erica A
authors.initials: EA
authors.lastname: Souza Silva
authors.forename: Janusz
authors.initials: J
authors.lastname: Pawliszyn
mesh_terms: D002138:Calibration; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D016018:Least-Squares Analysis; D057230:Limit of Detection; D009339:Needles; D015203:Reproducibility of Results; D052617:Solid Phase Microextraction / Q000295:instrumentation* / Q000379:methods*; D055549:Volatile Organic Compounds / Q000032:analysis
chemical_list: D055549:Volatile Organic Compounds
keywords: Gas chromatography–ion mobility spectrometry; Needle trap device; On-site analysis; Solid phase microextraction; Volatile organic compounds