Pyrolysis carbon compound-specific isotope analysis (Py-CSIA) of Eucalyptus spp. bark and the extracted lignin

Changes in climatic and environmental conditions can affect both, plant chemical molecular atomic composition. Therefore, biomass carbon isotope composition is frequently used to gain information about the at time a thrives. In this field, most studies use values obtained from bulk samples. However, these are weighted average of different compounds. The isotopic characterization individual compounds represents relevant analytical advance able differentiate main components i.e., polysaccharides, lignin, polypeptides, lipids, waxes, etc. Here, we investigate link between bark lignin extracted three Eucalyptus species (E. grandis, E. dunnii hybrid grandis X dunnii) using pyrolysis compound-specific analysis (Py-CSIA). This technique, although not widely used, has been previously developed applied, with variants, characterize products including sugars, terpenes. Retrieved results for both samples showed differences regarding diverse biogenic groups, accounting 13C-enrichment polysaccharides up 2.5‰ compared methoxyphenols, which consistent fractionation during metabolization plant. A strong positive correlation was found values, especially when applying weight factor related relative abundance each compound, support suitability technique. Despite that origins provide very similar patterns, specific make difference giving additional valuable information.