High-speed, thermally modulated SFE/GC for the analysis of volatile organic compounds in solid matrices

1992 ◽  
Vol 4 (3) ◽  
pp. 199-208 ◽  
Author(s):  
Zaiyou Liu ◽  
Paul B. Farnsworth ◽  
Milton L. Lee
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
High Speed ◽  
Volatile Organic ◽  
Solid Matrices

A microfabricated optofluidic ring resonator for sensitive, high-speed detection of volatile organic compounds

Lab on a Chip ◽  
2014 ◽  
Vol 14 (19) ◽  
pp. 3873-3880 ◽  
Author(s):  
Kee Scholten ◽  
Xudong Fan ◽  
Edward T. Zellers
Keyword(s):  
Gas Chromatography ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
High Speed ◽  
Ring Resonator ◽  
Micro Scale ◽  
Volatile Organic

A microfabricated optofluidic ring resonator (μOFRR) sensor is introduced and its utility as a detector for micro-scale gas chromatography is assessed.

scholarly journals The Effect of Adsorbed Volatile Organic Compounds on an Ultrathin Water Film Measurement

2020 ◽  
Vol 10 (17) ◽  
pp. 5981 ◽  
Author(s):  
Shahab Bayani Ahangar ◽  
Chan Ho Jeong ◽  
Fei Long ◽  
Jeffrey S. Allen ◽  
Seong Hyuk Lee ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Surface Treatment ◽  
Organic Compounds ◽  
High Speed ◽  
Water Film ◽  
Water Layer ◽  
Dropwise Condensation ◽  
Air Plasma ◽  
High Speed Imaging ◽  
Volatile Organic

Using surface plasmon resonance imaging (SPRi), we have recently shown for the first time the existence of a monolayer water film between droplets during dropwise condensation. This study examines the effect of adsorbed volatile organic compounds (VOCs) on the ultrathin film measurement using SPRi. Further, the work presents the proper surface-treatment process that enables measurements of the ultrathin water layer during high-speed imaging of dropwise condensation at 3000 frame per second. In this study, two methods were applied for cleaning the surface (gold-coated glass)—(1) standard cleaning procedure (SCP) using acetone, isopropyl alcohol, and deionized water and (2) SCP followed by air plasma cleaning. This work discusses the effect of the cleaning procedures on surface roughness, contact angle, and surface chemistry using atomic force microscopy, optical microscopy, and an X-ray photoelectron spectroscope meter. The results showed that SCP before the SPRi is a proper surface-treatment method. The effect of adsorbed VOCs during dropwise condensation on a surface treated with SCP was measured to be 0.0025 (reflectivity unit), which was 70% smaller than the reflectance associated with a monolayer water film. The results of this work confirm a monolayer water film observation during the dropwise condensation, which has been reported before.

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