Compound‐specific stable carbon isotopic signature of carbohydrate pyrolysis products from C3 and C4 plants

Abstract

BACKGROUND: Pyrolysis-compound specific isotopic analysis (Py-CSIA: Py-GC-(FID)-

Derivatization of Levoglucosan for Compound-Specific δ13C Analysis by Gas Chromatography/Combustion/Isotope Ratio Mass Spectrometry

“…Table 3 presents δ 13 C values of microcrystalline cellulose and its combustion particle product levoglucosan under four temperatures. 13 C was enriched in levoglucosan during the combustion process for all four temperatures, presumably resulting from the 13 C depletion in gas phase products, as other studies observed [2,5,6]. On the other hand, the variations in temperature did not seem to have a significant effect on the level of enrichment of 13 C. e standard deviation of enrichment for four temperatures was 0.15‰, suggesting combustion temperature (300-600°C) plays a little role on isotope fractionation of levoglucosan.…”

“…Levoglucosan (1.6-anhydro- β -D-glucopyranose) is a thermal decomposition product of cellulose and hemicellulose in biomass at temperatures above 300°C [ 1 ]. Pyrolysis of starch, sucrose, and neat glucose also produces levoglucosan [ 2 – 4 ]. Stable carbon isotope analysis is a valuable tool, because the stable isotope ratio of organic compounds depends on the isotope composition of the source, environmental conditions, and specific chemical pathways and mechanisms that lead to the formation of the compound.…”

“…Stable carbon isotope analysis is a valuable tool, because the stable isotope ratio of organic compounds depends on the isotope composition of the source, environmental conditions, and specific chemical pathways and mechanisms that lead to the formation of the compound. There have been reports measuring directly the δ 13 C values of levoglucosan as one of pyrolysis products of sucrose [ 2 ] and cellulose [ 5 ] using pyrolysis gas chromatography/isotope ratio mass spectrometry and levoglucosan in biomass burning aerosols by thermal desorption-2 dimensional gas chromatography/isotope ratio mass spectrometry [ 6 ].…”

Differentiation of wood‐derived vanillin from synthetic vanillin in distillates using gas chromatography/combustion/isotope ratio mass spectrometry for δ13C analysis

“…Nonetheless, the δ 13 C value for 5‐HMF in this sample is quite high for a C4 plant. According to a study undertaken by González‐Pérez et al, 5‐HMF has on average a δ 13 C value 3‰ higher than that of the sugar from which it was derived; therefore, the value of −7.4‰ is possible given that the δ 13 C value of the sugarcane is around −10‰.…”

Pyrolysis-gas chromatography–isotope ratio mass spectrometry for monitoring natural additives in polylactic acid active food packages

“…Isotope ratio mass spectrometry (IRMS) is extensively used to trace the origin of biogenic materials and to enlighten relevant scientific and technical questions in food science and the industry, including aspects related to traceability and fraud detection [12][13][14][15]. The stable carbon isotopic composition (δ 13 C) of plants depends on carbon fixation process such as the C3 or C4 cycle.…”