目的建立HPAEC-PAD法测定霍山石斛Dendrobium huoshanense C. Z. Tang et S. J. Cheng中甘露糖、葡萄糖、果糖、半乳糖、阿拉伯糖、木糖的含有量。方法依次采用超声处理、水解和氮气吹干法制备供试品溶液。氢氧化钠/醋酸钠溶液梯度洗脱...目的建立HPAEC-PAD法测定霍山石斛Dendrobium huoshanense C. Z. Tang et S. J. Cheng中甘露糖、葡萄糖、果糖、半乳糖、阿拉伯糖、木糖的含有量。方法依次采用超声处理、水解和氮气吹干法制备供试品溶液。氢氧化钠/醋酸钠溶液梯度洗脱;温度30℃;电极材料Au;参比电极pH-Ag/AgCl;电位波形糖四电位;体积流量0.45 mL/min。结果甘露糖、葡萄糖、果糖、半乳糖、阿拉伯糖、木糖在各自范围内线性关系良好(r>0.990 0),平均加样回收率分别为93.4%、92.3%、93.7%、106.1%、94.1%、103.7%,RSD分别为2.1%、1.7%、3.3%、1.2%、4.5%、1.7%。结论该方法稳定性好,灵敏度高,可用于霍山石斛的质量控制。展开更多
本研究建立了高效阴离子交换–脉冲安培检测法(HPAEC-PAD)分析海参(Apostichopus japonicus)多糖的单糖组成及含量测定。通过比较3种蛋白去除法对海参多糖含量的影响,优化海参多糖纯化方法;比较淋洗液浓度对单糖分离效果的影响,优化海...本研究建立了高效阴离子交换–脉冲安培检测法(HPAEC-PAD)分析海参(Apostichopus japonicus)多糖的单糖组成及含量测定。通过比较3种蛋白去除法对海参多糖含量的影响,优化海参多糖纯化方法;比较淋洗液浓度对单糖分离效果的影响,优化海参中单糖分离的色谱条件。结果显示,Sevag法去蛋白的效果最好,在淋洗液为20 mmol/L Na OH的条件下分离岩藻糖、氨基半乳糖、氨基葡萄糖、半乳糖、甘露糖、阿拉伯糖、葡萄糖和乳糖;在淋洗液为160 mmol/L Na OH和200 mmol/L Na AC的条件下分离葡萄糖醛酸和半乳糖醛酸。各单糖标准曲线的线性相关系数不低于0.998,检出限为2.5~50μg/L,加标回收率在83.6%~113.1%之间。该方法可测定海参多糖的中性糖、氨基糖和糖醛酸,可作为海参及其制品中的单糖分析及定量方法,为相关标准的制定提供参考。展开更多
Polygonatum sibiricum,famous for its physiological activities,is a popular Chinese food and a traditional Chinese herb containing many carbohydrates as the main component.However,except for most reported polysaccharid...Polygonatum sibiricum,famous for its physiological activities,is a popular Chinese food and a traditional Chinese herb containing many carbohydrates as the main component.However,except for most reported polysaccharides,other detailed compositions of carbohydrates are still not clear.To verify the controversial existence of starch and investigate other components,especially oligosaccharides,we used iodine–potassium iodide colorimetric detection and enzymatic hydrolysis to determine starch.Then,oligosaccharides were analyzed by thin-layer chromatography,gel permeation chromatography,high-performance anion exchange chromatography with pulsed amperometric detection,and hydrophilic interaction chromatography–electrospray tandem mass spectrometry.The results showed that the rhizome of P.sibiricum lacked starch,and fructooligosaccharides were the main component,accounting for approximately 28.95%.Oligosaccharides with degrees of polymerization above 10 were the most abundant components.This study clearly illustrated the unknown carbohydrate components of the Polygonatum rhizome,promoting its functional value with new evidence.展开更多
文摘目的建立HPAEC-PAD法测定霍山石斛Dendrobium huoshanense C. Z. Tang et S. J. Cheng中甘露糖、葡萄糖、果糖、半乳糖、阿拉伯糖、木糖的含有量。方法依次采用超声处理、水解和氮气吹干法制备供试品溶液。氢氧化钠/醋酸钠溶液梯度洗脱;温度30℃;电极材料Au;参比电极pH-Ag/AgCl;电位波形糖四电位;体积流量0.45 mL/min。结果甘露糖、葡萄糖、果糖、半乳糖、阿拉伯糖、木糖在各自范围内线性关系良好(r>0.990 0),平均加样回收率分别为93.4%、92.3%、93.7%、106.1%、94.1%、103.7%,RSD分别为2.1%、1.7%、3.3%、1.2%、4.5%、1.7%。结论该方法稳定性好,灵敏度高,可用于霍山石斛的质量控制。
文摘本研究建立了高效阴离子交换–脉冲安培检测法(HPAEC-PAD)分析海参(Apostichopus japonicus)多糖的单糖组成及含量测定。通过比较3种蛋白去除法对海参多糖含量的影响,优化海参多糖纯化方法;比较淋洗液浓度对单糖分离效果的影响,优化海参中单糖分离的色谱条件。结果显示,Sevag法去蛋白的效果最好,在淋洗液为20 mmol/L Na OH的条件下分离岩藻糖、氨基半乳糖、氨基葡萄糖、半乳糖、甘露糖、阿拉伯糖、葡萄糖和乳糖;在淋洗液为160 mmol/L Na OH和200 mmol/L Na AC的条件下分离葡萄糖醛酸和半乳糖醛酸。各单糖标准曲线的线性相关系数不低于0.998,检出限为2.5~50μg/L,加标回收率在83.6%~113.1%之间。该方法可测定海参多糖的中性糖、氨基糖和糖醛酸,可作为海参及其制品中的单糖分析及定量方法,为相关标准的制定提供参考。
基金This work was financially supported by the grants from Ningbo Municipal Bureau of Science and Technology(2022Z174)The Major Agricultural Technology Collaborative Promotion Plan of Zhejiang Province(2022XTTGZYC03)The Key Research and Development Program of Zhejiang Province(2021C02001),China.
文摘Polygonatum sibiricum,famous for its physiological activities,is a popular Chinese food and a traditional Chinese herb containing many carbohydrates as the main component.However,except for most reported polysaccharides,other detailed compositions of carbohydrates are still not clear.To verify the controversial existence of starch and investigate other components,especially oligosaccharides,we used iodine–potassium iodide colorimetric detection and enzymatic hydrolysis to determine starch.Then,oligosaccharides were analyzed by thin-layer chromatography,gel permeation chromatography,high-performance anion exchange chromatography with pulsed amperometric detection,and hydrophilic interaction chromatography–electrospray tandem mass spectrometry.The results showed that the rhizome of P.sibiricum lacked starch,and fructooligosaccharides were the main component,accounting for approximately 28.95%.Oligosaccharides with degrees of polymerization above 10 were the most abundant components.This study clearly illustrated the unknown carbohydrate components of the Polygonatum rhizome,promoting its functional value with new evidence.
