title: Development of syringe pump assisted headspace sampler.
abstract: This report describes a new platform for headspace sampling technique, i.e. a syringe pump assisted headspace sampler (SPHS). The stand type pump's syringe itself was used as a sealed sample vial and a needle trap device (NTD) was adopted as a miniaturized sorbent tube. The NTD was directly used to inject trapped VOCs into a gas chromatograph. The proposed sampler was designed to take a whole headspace volume instead of a portion of it so as to enhance easily the extraction efficiency. The performance of the SPHS-NTD system was evaluated and compared with the solid-phase microextraction (SPME) with a static headspace (HS) sampling technique. Calibration curves were obtained for aqueous TEX (toluene, ethylbenzene, and o-xylene) solutions in the concentration range of ∼0.1-45 ng/mL. The calculated limit of detections (LOD, S/N=3) for TEX were 0.13 ng/mL or less. This SPHS-NTD was successfully applied to analyze aqueous TEX in river water samples and showed highly good recovery ranged from 97.2% to 105.8% for all tested VOCs.
authors.affiliation: Department of Life Chemistry, Catholic University of Daegu, Gyeongsan 712-702, Republic of Korea.
authors.forename: Un Jeong
authors.initials: UJ
authors.lastname: Go
authors.affiliation: Department of Life Chemistry, Catholic University of Daegu, Gyeongsan 712-702, Republic of Korea; Natural Science Research Institute, Catholic University of Daegu, Gyeongsan 712-702, Republic of Korea. Electronic address: einyong@cu.ac.kr.
authors.forename: In-Yong
authors.initials: IY
authors.lastname: Eom
mesh_terms: D002138:Calibration; D002849:Chromatography, Gas / Q000379:methods; D005618:Fresh Water / Q000737:chemistry; D015203:Reproducibility of Results; D052617:Solid Phase Microextraction / Q000295:instrumentation* / Q000379:methods; D013594:Syringes; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D014874:Water Pollutants, Chemical
keywords: BTEX; Dynamic headspace sampling; Headspace sampler; Needle trap device; Water analysis