<i>In situ</i> methanation with flame ionization detection for the determination of carbon dioxide in various matrices

Luong, Jim; Hua, Yujuan; Gras, Ronda; Hawryluk, Myron

doi:10.1039/c8ay00079d

Cited by 5 publications

(6 citation statements)

References 13 publications

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“…The peak widths remain relatively constant beyond 400°C for both analytes. The finding on CO 2 is consistent with earlier observations for the methanation of CO 2 to methane using a similar device . Under the conditions used, very respectable ω h of around 2 s for CO and CO 2 were achieved demonstrating the compatibility of the 3D‐printed device with capillary GC time scale.…”

Section: Resultssupporting

confidence: 90%

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Metal 3D‐printed catalytic jet and flame ionization detection for in situ trace carbon oxides analysis by gas chromatography

Gras

Hua

Luong

et al. 2019

J of Separation Science

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A gas chromatographic approach for the determination and quantification of trace levels of carbon oxides in gas phase matrices for in situ or near‐line/at‐line analysis has been successfully developed. Catalytic conversion of the target compounds to methane via the methanation process was conducted inside a metal 3D‐printed jet that also acted as a hydrogen burner for the flame ionization detector. Modifications made to a field transportable gas chromatograph enabled the leveraging of advantaged microfluidic‐enhanced chromatography capability for improved chromatographic performance and serviceability. The compatibility with adsorption chromatography technology was demonstrated with in‐house constructed columns. Sustained reliable conversion efficiencies of greater than 99% with respectable peak symmetries were attained at 400°C. Quantification of carbon monoxide and carbon dioxide at a parts‐per‐million level over a range from 0.2 ppm to 5% v/v for both compounds with a respectable precision of less than 3% relative standard deviation for peak area (n = 10) and a detection limit of 0.1 ppm v/v was achieved. Linearity with correlation coefficients of R2 greater than 0.9995 and measured recoveries of >99% for spike tests were achieved. The 3D‐printed steel jet was found to be reliable and resilient against potential contamination from the matrices owing to the in situ backflushing capability.

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Section: Resultssupporting

confidence: 90%

“…The reduction in temperatures minimizes chromatographic column stationary phase breakdown due to thermal stress, reduces oven cool‐down time after oven temperature programming is complete and therefore improves sample throughput. The detail of this backflush concept has been described elsewhere .…”

Section: Resultsmentioning

confidence: 99%

Metal 3D‐printed catalytic jet and flame ionization detection for in situ trace carbon oxides analysis by gas chromatography

Gras

Hua

Luong

et al. 2019

J of Separation Science

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“…As can be seen from Figure , the PW 1/2 values of both analytes decrease substantially with increasing detector temperature from 300 to 350 °C. The peak width remains relatively constant beyond 375 °C, consistent with earlier findings for the methanation of carbon monoxide and carbon dioxide to methane using a similar device, as reported earlier . Under the conditions used, very respectable PW 1/2 values of 2.4 and 2.7 s for formaldehyde and acetaldehyde were achieved, demonstrating the compatibility of the 3D-printed device with the capillary gas chromatography time scale.…”

Section: Resultssupporting

confidence: 89%

“…The peak width remains relatively constant beyond 375 °C, consistent with earlier findings for the methanation of carbon monoxide and carbon dioxide to methane using a similar device, as reported earlier. 33 Under the conditions used, very respectable PW 1/2 values of 2.4 and 2.7 s for formaldehyde and acetaldehyde were achieved, demonstrating the compatibility of the 3D-printed device with the capillary gas chromatography time scale. Conversion efficiencies of formaldehyde and acetaldehyde to methane and ethane, respectively, were found to be relatively constant, at an average rate of 90% (±2%) from 375 to 450 °C.…”

Section: ■ Results and Discussionmentioning

confidence: 74%

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Gas Chromatography with In Situ Catalytic Hydrogenolysis and Flame Ionization Detection for the Direct Measurement of Formaldehyde and Acetaldehyde in Challenging Matrices

et al. 2018

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A gas chromatographic strategy to advance the direct detection and quantification of volatile aliphatic aldehydes such as formaldehyde and acetaldehyde in gas phase matrices without the need for sample pretreatment or concentration has been successfully developed. The catalytic hydrogenolysis of aldehydes to alkanes is conducted in situ within the 3D-printed steel jet assembly of the flame ionization detector and without any additional hardware required. Reliable conversion efficiencies of greater than 90% with respectable peak symmetries for the analytes were attained at 400 °C. Quantification of formaldehyde and acetaldehyde at parts-per-million levels over a range of 0.5–300 ppm (v/v) for formaldehyde and 0.2–430 ppm (v/v) for acetaldehyde with a respectable precision of less than 5% RSD (n = 10) was achieved. The total analysis time was less than 10 min. Linearity with a correlation coefficient (R 2) greater than 0.9997 and measured recoveries of >99% for spike tests under the specified conditions were achieved. The 3D-printed steel jet assembly was found to be reliable and resilient to matrices such as air, water, hydrocarbons, and aromatics. An additional benefit realized with this analytical strategy is that the slight restriction induced by the presence of the catalyst in the 3D-printed jet assembly enables backflush via the inlet split vent without the need for additional pressure control or intercolumn-connection devices. The utility of this technique was demonstrated with important aldehyde applications from various segments.

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Swinley²

2019

A Practical Guide to Gas Analysis by Gas Chromatography

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In situ methanation with flame ionization detection for the determination of carbon dioxide in various matrices

Abstract: An analytical technique that employs in situ methanation with flame ionization detection for the measurement of carbon dioxide in various matrices has been developed and implemented.

Cited by 5 publications

References 13 publications

Metal 3D‐printed catalytic jet and flame ionization detection for in situ trace carbon oxides analysis by gas chromatography

Metal 3D‐printed catalytic jet and flame ionization detection for in situ trace carbon oxides analysis by gas chromatography

Gas Chromatography with In Situ Catalytic Hydrogenolysis and Flame Ionization Detection for the Direct Measurement of Formaldehyde and Acetaldehyde in Challenging Matrices

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