A high-speed, high-performance, microfabricated comprehensive two-dimensional gas chromatograph
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- California Inst. of Technology (CalTech), Pasadena, CA (United States)
A small, consumable-free, low-power, ultra-high-speed comprehensive GC×GC system consisting of microfabricated columns, nanoelectromechanical system (NEMS) cantilever resonators for detection, and a valve-based stop-flow modulator is demonstrated. The separation of a highly polar 29-component mixture covering a boiling point range of 46 to 253 °C on a pair of microfabricated columns using a Staiger valve manifold in less than 7 seconds, and just over 4 seconds after the ensemble holdup time is demonstrated with a downstream FID. The analysis time of the second dimension was 160 ms, and peak widths in the second dimension range from 10–60 ms. A peak capacity of just over 300 was calculated for a separation of just over 6 s. Data from a continuous operation testing over 40 days and 20 000 runs of the GC×GC columns with the NEMS resonators using a 4-component test set is presented. As a result, the GC×GC-NEMS resonator system generated second-dimension peak widths as narrow as 8 ms with no discernable peak distortion due to under-sampling from the detector.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- DARPA Micro Gas Analyzer; USDOE
- Grant/Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1507410
- Alternate ID(s):
- OSTI ID: 1503725
- Report Number(s):
- SAND--2019-3452J; 673864
- Journal Information:
- Lab on a Chip, Journal Name: Lab on a Chip Journal Issue: 9 Vol. 19; ISSN LCAHAM; ISSN 1473-0197
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Chemical Profiling of Volatile Organic Compounds in the Headspace of Algal Cultures as Early Biomarkers of Algal Pond Crashes
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journal | September 2019 |
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