**2. Analysis of plant fiber composition**

High-performance anion-exchange chromatography with an integrated pulsed amperometric method (HPAEX-IPAM) is a newly developed method for sugar analysis in recent years. Zheng [23, 24] established HPAEX-IPAM for the

*Study on Pyrolysis Behaviors of Various Plant Fibers DOI: http://dx.doi.org/10.5772/intechopen.109294*


#### **Table 1.**

*Information of plant fiber compositions (%) [27].*

determination of monosaccharides (arabinose, galactose, glucose, xylose, and mannose), glycuronate acid (galacturonic acid and glucuronic acid), and cellobiose in plant fiber hydrolysate. In order to hydrolyze cellulose, National Renewable Energy Laboratory (NREL) method optimized by the heating method is used to hydrolyze cellulose into monosaccharides. Then, monosaccharides are separated by an efficient anion exchange column in a strong alkaline medium, and then, the current generated by the oxidation reaction of hydroxyl groups in the sugar molecular structure on the gold electrode surface is detected [25, 26]. This method is simple in pretreatment, and the pulsed amperometric detector has high sensitivity, selectivity, accuracy, and reproducibility. Calculate the content of fiber components, according to the concentration of hydrolysis products of each fiber component. Zheng [23, 24] used this method to determine the acid hydrolysis monosaccharides of six common plant fibers (coniferous fiber, broadleaf fiber, bamboo fiber, flax fiber, grass fiber, and cotton fiber), and calculated the composition of cellulose and hemicellulose of each plant fiber, according to the corresponding hydrolysis monosaccharides mass fraction of cellulose and hemicellulose (as shown in **Table 1**). The lignin content shown in **Table 1** is the sum of acid-insoluble lignin and acid-soluble lignin, which are determined by weighing the filter residue and detecting acid hydrolysate with UV.
