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中文摘要：
本研究利用高效排阻色谱与多角度激光散射分析仪、示差折光仪串联建立淀粉结构分析的方法并得出相关分子特征参数。结果表明：采用Berry法三阶拟合可推导得出淀粉绝对分子质量及其分布、平均旋转半径（rz）、多分散系数。普通玉米淀粉、蜡质玉米淀粉、小麦淀粉、糯米淀粉、大米淀粉及马铃薯淀粉的重均分子质量Mw（rz）分别为17.94×10^7g/mol（79nm）、18.11×10^7g/mol（81.1nm）、7.86×10^7g/mol（50.4nm）、13.04×10^7g/mol（62.9nm）、64.3×10^7g/mol（64.3nm）及7.73×10^7g/mol（75.9nm）。该方法可作为一种简便、快速的测定淀粉分子结构的现代分析技术。
英文摘要：
A method using high-performance size-exclusion chromatography （HPSEC） equipped with multi-angle laser-light scattering （MALLS） and refractive index detector （RID） was presented for determining molecular features of starch. Results indicated that the weight-average molecular weight （Mw）, z-average radius of gyration （rz） and polydispersity index could be obtained using the Berry extrapolation method with a third-order polynomial fitting. The Mw （rz） of common maize starch, waxy maize starch, wheat starch, sticky rice starch, rice starch and potato starch were measured to be 17.94 ×10^7g/mol （79 nm）, 18.11 ×10^7g/mol （81.1 nm）, 7.86 ×10^7g/mol （50.4 nm）, 13.04 ×10^7g/mol（62.9 nm）, 64.3 ×10^7g/mol（64.3 nm）, and 7.73 ×10^7g/mol （75.9 nm）, respectively. This method can provide a convenient and easy approach for starch molecule structure analysis.
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