Journal of Tropical Oceanography >
Analysis of physicochemical properties and structure characteristics of several crude algal polysaccharides
Received date: 2017-04-26
Request revised date: 2017-07-18
Online published: 2018-04-11
Supported by
Hainan Province Natural Science Foundation (20153162, 20163071, 20163074)
Copyright
The monosaccharide composition, functional groups and molecular weight of five crude algal polysaccharides were analyzed by using fourier transform infrared spectroscopy (FTIR), gas chromatography (GC) and gel permeation chromatography (GPC). The results showed that five crude algal polysaccharides contained both xylose and fucose. Padina australis polysaccharide, which was the high molecular weight uniformity-polysaccharide, contained the rich sorbitol, whereas Ulva lactuca polysaccharide had a wide molecular weight distribution and was the poor uniformity-polysaccharide. The analysis of FTIR indicated that five crude polysaccharides were both acidic polysaccharides. Caulerpa sertularioides, Sargassum polycystum and Betaphycus gelatinum polysaccharide had obvious absorption peak of sulfate group. The structure of Betaphycus gelatinum polysaccharide included furanose and pyranose, and the glycosidic bond might include beta and alpha types. The sulfate content of Padina australis polysaccharide was 38.43% (±2.38%), which was significantly higher than that of the other kinds of algal polysaccharides, whereas the sulfate content of Caulerpa sertularioides polysaccharide was only 8.92%(±1.04%).
Key words: algal polysaccharide; component; structure; molecular weight; sulfate group
HOU Ping , MA Jun , CHEN Yan , PEI Zhisheng , ZHAO Jing , YE Xipeng , JIANG Fangyan , HUANG Hai . Analysis of physicochemical properties and structure characteristics of several crude algal polysaccharides[J]. Journal of Tropical Oceanography, 2018 , 37(2) : 55 -62 . DOI: 10.11978/2017049
Fig. 1 Ultraviolet(UV) scanning of five crude algal polysaccharide图1 5种海藻粗多糖的紫外光谱扫描分析 |
Fig. 2 GC chromatogram of complex monosaccharide derivative图2 混合单糖标准品的气相色谱图 |
Fig. 3 GC chromatogram of five crude algal polysaccharide图3 5种海藻粗多糖的气相色谱图分析 |
Fig. 4 Infrared spectra of five crude algal polysaccharide图4 5种海藻粗多糖红外光谱图 |
Tab. 1 Weight average molecular mass, number average molecular mass, and distribution coefficient of five crude algal polysaccharide表1 5种海藻粗多糖的重均分子量、数均相对分子质量及其分布系数 |
Mw | Mn | D(Mw/Mn) | |
---|---|---|---|
UlPS | 19570 | 9382 | 2.086 |
SaPS | 3736 | 2611 | 1.431 |
PaPS | 119100 | 113700 | 1.048 |
BePS | 8337 | 5130 | 1.625 |
CaPS | 8645 | 7048 | 1.227 |
Fig. 5 Contents of sulfate groups in five crude algal polysaccharide图5 5种海藻粗多糖的硫酸基团含量 |
The authors have declared that no competing interests exist.
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