A New Approach to Sampling Petroleum Product Films from Water Surfaces and Their Subsequent Analysis by Gas Chromatography–Mass Spectrometry

Gribova, E. D.; Зуев, Б. К.; Polotnyanko, N. A.

doi:10.1134/s1061934822070061

Cited by 1 publication

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“…Gas chromatography (GC) is an analytical tool widely used for several applications including medicine, biomarker identification for health monitoring, petrochemical industry, environmental monitoring, food processing, and biochemistry. − Photoionization detectors (PIDs) demonstrate excellent performance for the detection of volatile organic compounds (VOCs) and are widely used in both conventional GC and micro gas chromatography (μGC) systems. − Several PID designs have been reported in the literature, and the current research interests are focused mainly on the miniaturization of PIDs . For a typical PID configuration, the core components include an ionization source, ionization chamber, and output signal readout mechanism.…”

Section: Introductionmentioning

confidence: 99%

Colorimetric Signal Readout for the Detection of Volatile Organic Compounds Using a Printable Glass-Based Dielectric Barrier Discharge-Type Helium Plasma Detector

et al. 2023

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In this paper, we report on a printable glass-based manufacturing method and a new proof-of-concept colorimetric signal readout scheme for a dielectric barrier discharge (DBD)-type helium plasma photoionization detector. The sensor consists of a millimeter-sized glass chamber manufactured using a printable glass suspension. Plasma inside the chip is generated using a custom-built power supply (900 V and 83.6 kHz), and the detector uses ∼5 W of power. Our new detection scheme is based on detecting the change in the color of plasma after the introduction of target gases. The change in color is first captured by a smartphone camera as a video output. The recorded video is then processed and converted to an image light intensity vs retention time plot (gas chromatogram) using three standard color space models (red, green, blue (RGB), hue, saturation, lightness (HSL), and hue, saturation, value (HSV)) with RGB performing the best among the three models. We successfully detected three different categories of volatile organic compounds using our new detection scheme and a 30-m-long gas chromatography column: (1) straight-chain alkanes (n-pentane, n-hexane, n-heptane, n-octane, and n-nonane), (2) aromatics (benzene, toluene, and ethylbenzene), and (3) polar compounds (acetone, ethanol, and dichloromethane). The best limit of detection of 10 ng was achieved for benzene at room temperature. Additionally, the device showed excellent performance for different types of sample mixtures consisting of three and five compounds. Our new detector readout method combined with our ability to print complex glass structures provides a new research avenue to analyze complex gas mixtures and their components.

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