Hyphenation of infrared spectroscopy to liquid chromatography for qualitative and quantitative polymer analysis: Degradation of poly(bisphenol A)carbonate

2006 ◽  
Vol 1130 (1) ◽  
pp. 34-42 ◽  
Author(s):  
Leon Coulier ◽  
Erwin Kaal ◽  
Thomas Hankemeier
Keyword(s):  
Liquid Chromatography ◽  
Infrared Spectroscopy ◽  
Bisphenol A ◽  
Polymer Analysis ◽  
Qualitative And Quantitative

The methods of formaldehyde emission testing of engine: A review

2015 ◽  
Vol 29 (Supplement 1) ◽  
pp. 1530009
Author(s):  
Chunhui Zhang ◽  
Peng Geng ◽  
Erming Cao ◽  
Lijiang Wei
Keyword(s):  
Infrared Spectroscopy ◽  
Sampling Method ◽  
Formaldehyde Emission ◽  
Qualitative And Quantitative Analysis ◽  
Engine Exhaust ◽  
Detection Techniques ◽  
Qualitative And Quantitative ◽  
Emission Testing ◽  
Variable Condition ◽  
Unregulated Emissions

A number of measurements have been provided to detect formaldehyde in the atmosphere, but there are no clear unified standards in engine exhaust. Nowadays, formaldehyde, an unregulated emission from methanol engine, has been attracting increasing attention by researchers. This paper presents the detection techniques for formaldehyde emitted from the engines applied in recent market, introducing the approaches in terms of unregulated emission tests of formaldehyde, which involved gas chromatography, liquid chromatography, chromatography-mass spectrometry, chromatography-spectrum, Fourier infrared spectroscopy and spectrophotometry. The author also introduces the comparison regarding to the advantages of the existing detection techniques based on the principle, to compare with engine exhaust sampling method, the treatment in advance of detection, obtaining approaches accessing to the qualitative and quantitative analysis of chromatograms or spectra. The accuratest result obtained was chromatography though it cannot be used continuously. It also can be utilized to develop high requirements of emissions and other regulations. Fourier infrared spectroscopy has the advantage of continuous detection for a variety of unregulated emissions and can be applied to the bench in variable condition. However, its accuracy is not as good as chromatography. As the conclusion, a detection technique is chosen based on different requirements.

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