Similarity Evaluation of Different Origins and Species of Dendrobiums by GC-MS and FTIR Analysis of Polysaccharides

Figure 1

The TIC chromatograph of standard monosaccharide by TMS methyl method. Arabinose (peaks 1, 2, 5, 6, and 8), rhamnose (peaks 3, 4, 7, and 9), xylose (peaks 10–13), mannose (peaks 14–16 and 19), galactose (peaks 17, 18, 20, and 21), glucose (peaks 22, 28, 29, and 32), galacturonic acid (peaks 23–26, 30, and 31), and fucose (peaks 27 and 33).