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Add-On Device Powered by Parallelized Adsorption Traps for Preconcentrator-GC–MS Measurement of sub-pmol/mol Levels of NF3

Year: 2024

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide In this study, an add-on preconcentration device powered by parallelized pretraps (PPTs) was utilized to measure the sub-pmol/mol levels of NF 3 in N 2 . The add-on preconcentrator was coupled to the detachable trap preconcentrator (DTP) with a gas chromatograph–mass spectrometer [ Anal. Chem. 2019, 91, 3342–3349]. The breakthrough volume of the parallel configuration was found to be substantially higher than that of the serial configuration with the same amount of adsorbent (HayeSep D). Liquid oxygen (LO 2 ) cooling (−183 °C) exhibited better preconcentration performance for NF 3 in N 2 compared to NF 3 in air (N 2 + O 2 ) with liquid nitrogen cooling (−195 °C) and NF 3 in air with LO 2 cooling. The DTP unit was essential to discriminate residual species, such as N 2, O 2, CO 2, and CF 4, of which the preconcentrated portion in the PPT can be excessive, enabling the overwhelm filtering capability of the quadrupole mass spectrometer. The limit of detection of NF 3 in N 2 of the PPT/DTP/gas chromatograph–mass spectrometer was 0.01 ppt, which is significantly better than that determined without using the add-on preconcentration device (0.21 ppt).

Source: ACS Omega

DOI: 10.1021/acsomega.4c04563

Authors: Jeong Sik Lim, Doohyun Yoon, Taewan Kim, Jinbok Lee

Institutions: Korea Research Institute of Standards and Science, Korea University of Science and Technology

Language: English

Topic: Analytical chemistry methods development

Subfield: Analytical Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,935

Funders: Ministry of Trade, Industry and Energy, Korea Meteorological Administration, Korea Research Institute of Standards and Science