SEC-MALLS法測(cè)定普魯蘭糖相對(duì)分子質(zhì)量及分子質(zhì)量分布
發(fā)布時(shí)間:2019-01-27 19:40
【摘要】:目的:建立分子排阻色譜-多角度激光散射(size exclusion chromatography-multiangle laser light scattering,SEC-MALLS)系統(tǒng)測(cè)定普魯蘭糖的相對(duì)分子質(zhì)量及分子質(zhì)量分布的方法。方法:采用2根Shodex SB-806HQ色譜柱(300 mm×7.8 mm,10μm)串聯(lián),以水為流動(dòng)相,流速0.5 m L·min-1,柱溫35℃,檢測(cè)器為多角度激光散射器(MALLS)和示差折光檢測(cè)器(refractive intex detector,RID)聯(lián)用,對(duì)普魯蘭糖的相對(duì)分子質(zhì)量及分子質(zhì)量分布進(jìn)行測(cè)定,并對(duì)均方根旋轉(zhuǎn)半徑(rg)與樣品在溶液中的聚集態(tài)進(jìn)行分析;同時(shí)還以傳統(tǒng)凝膠滲透色譜(GPC)法對(duì)普魯蘭糖的相對(duì)分子質(zhì)量及分子質(zhì)量分布進(jìn)行測(cè)定,并對(duì)2種方法測(cè)定的結(jié)果進(jìn)行分析比較。結(jié)果:SEC-MALLS法測(cè)定普魯蘭糖樣品的結(jié)果與GPC法測(cè)定的結(jié)果比較,2種系統(tǒng)測(cè)定的重均相對(duì)分子質(zhì)量及分子質(zhì)量分布結(jié)果基本一致,同時(shí)測(cè)得普魯蘭糖在水溶液中為無規(guī)線團(tuán)構(gòu)象的線性聚合物。結(jié)論:SECMALLS法測(cè)定相對(duì)分子質(zhì)量無需分子量標(biāo)樣,可以同時(shí)獲得樣品在溶液中的聚集態(tài)和構(gòu)象信息,可用于普魯蘭糖的質(zhì)量控制。
[Abstract]:Aim: to establish a molecular exclusion chromatography-multi-angle laser scattering (size exclusion chromatography-multiangle laser light scattering,SEC-MALLS) system for the determination of relative molecular weight and molecular mass distribution of prulanose. Methods: two Shodex SB-806HQ columns (300 mm 脳 7.8 mm,10 渭 m) were used in series, with water as mobile phase and flow rate of 0.5 mL min-1, at 35 鈩,
本文編號(hào):2416626
[Abstract]:Aim: to establish a molecular exclusion chromatography-multi-angle laser scattering (size exclusion chromatography-multiangle laser light scattering,SEC-MALLS) system for the determination of relative molecular weight and molecular mass distribution of prulanose. Methods: two Shodex SB-806HQ columns (300 mm 脳 7.8 mm,10 渭 m) were used in series, with water as mobile phase and flow rate of 0.5 mL min-1, at 35 鈩,
本文編號(hào):2416626
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