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Parallel Ionic Liquid Semi-Packed Microfabricated Columns for Complex Gas Analysis



Details

  • Personal Author:
  • Description:
    The paper presents a parallel micro gas chromatography approach using three ionic liquid semipacked columns. Switching from single column to multiple parallel columns with different selectivity enhances the power of compound identification without increasing the analysis time. The columns are fabricated using microelectromechanical systems (MEMS) technology containing an array of microfabricated pillars. The columns are 1 m-long and 240 um-deep with four pillars per row. All columns were functionalized with ionic liquid stationary phases using a modified static coating technique and demonstrated the number of theoretical plates between 5000 and 8300 per meter. The chip performance was investigated with four different samples: (1) a mixture of C7-C30 saturated alkanes, (2) a multianalyte mixture consisting of 20 compounds ranging from 80 to 238 degrees C in boiling point, (3) a mixture of five organic chemicals with varying degrees of polarity, and (4) 46-compounds mixture containing all the chemicals in the first three samples. The individual columns separated 75%-100% of the first three samples but failed to distinguish all 46 compounds due to coeluting analytes; however, the parallel configuration provided more retention time information by which all the compounds in all samples were fully determined. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • ISSN:
    0003-2700
  • Document Type:
    Text
  • Funding:
    Grant
  • Genre:
    Journal Article
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Volume:
    92
  • Issue:
    15
  • NIOSHTIC Number:
    nn:20061560
  • Citation:
    Anal Chem 2020 Aug; 92(15):10635-10642
  • Contact Point Address:
    Masoud Agah, VT MEMS Lab, Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
  • Email:
    agah@vt.edu
  • Federal Fiscal Year:
    2020
  • NORA Priority Area:
    Transportation, Warehousing and Utilities
  • Performing Organization:
    Virginia Polytechnic Institute and State University
  • Peer Reviewed:
    True
  • Start Date:
    20190601
  • Source Full Name:
    Analytical Chemistry
  • End Date:
    20230531
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:42c74eed76ce895b10c305780432ff16e71f6ce7aee12320bc255ba4b76bd78f8a0157d8d9a5634aa2bdc604c5959a989b7750442e8aa7f0933a375273bff9d8
  • Download URL:
  • File Type:
    Filetype[PDF - 543.54 KB ]
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