Metal-organic frameworks as superior media for thermal desorption-gas chromatography application: A critical assessment of MOF-5 for the quantitation of airborne formaldehyde
- Authors
- Kim, Yong-Hyun; Kumar, Pawan; Kwon, Eilhann E.; Kim, Ki-Hyun
- Issue Date
- May-2017
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Metal organic framework; Formaldehyde; Ambient air; Thermal desorption
- Citation
- MICROCHEMICAL JOURNAL, v.132, pp.219 - 226
- Indexed
- SCIE
SCOPUS
- Journal Title
- MICROCHEMICAL JOURNAL
- Volume
- 132
- Start Page
- 219
- End Page
- 226
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/4214
- DOI
- 10.1016/j.microc.2017.01.032
- ISSN
- 0026-265X
- Abstract
- In this study, formaldehyde (FA) in the air was collected and analyzed using metal-organic framework-5 (MOP-5) as the sorbent material (for both sorbent tube (ST) sampling and thermal desorption (TD) analysis) in gas chromatography-mass spectrometry (GC-MS) detection. A series of experiments was carried out to determine the optimal analytical conditions for maximum recovery of FA by TD-GC-MS. Optimal TD conditions for adsorption and desorption of MOF-5 were determined to be - 25 degrees C and 100 degrees C, respectively. These conditions yielded good linearity (R-2 = 0.9975), precision (mean 1.79 +/- 1.17%), and high sensitivity. The method detection limit (MDL) of 0.1 ng was attained to determine 0.82 ppb of FA in 100 mL of air (limit of detection (LOD) of 8 pg (0.06 ppb)). The concentration of FA, when measured from ambient air samples using MOF-5, averaged 9.67 ppb (n = 3, RSE = 239%). FA samples, when analyzed in parallel using the DNPH cartridge-HPLC-UV system recommended by the US EPA, yielded similar results (mean of 10.5 ppb) to the MOF-5 dataset In addition, trace quantities of FA (0.25 ng) were also detected from samples of as little as 20 mL of air. Our results suggest that MOF-5 is a suitable sorbent media for thermal desorption analysis and in fact surpasses the performance of commercial sorbents used for VOC analysis. As such, a GC-based detection method for FA comprising simple thermal desorption without complicated procedures, such as a derivatization step, was realized.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 공과대학 > 서울 건설환경공학과 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/4214)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.