In order to investigate the food nutrition and safety of potato,the objective of the present study is to quantify glycoalkaloids(-chaconine and-solanine)and phenolic compounds in three potato cultivars,namely,Russet B...In order to investigate the food nutrition and safety of potato,the objective of the present study is to quantify glycoalkaloids(-chaconine and-solanine)and phenolic compounds in three potato cultivars,namely,Russet Burbank,Atlantic,and Shepody,grown in Hebei,China,and these two classes of biologically active compounds in commercial dehydrated potato flakes were also investigated.The total glycoalkaloid levels in whole potatoes ranged from 4.72 mg/kg for Shepody potatoes to 34.45 mg/kg for Russet Burbank potatoes.The ratio of-chaconine to-solanine in whole potatoes ranged from 0.41 for Russet Burbank potatoes to 3.61 for Atlantic potatoes.The removal rate of total glycoalkaloids in Russet Burbank potatoes during dehydrated potato flake processing is 90.0%.Chlorogenic acid is the dominant phenolic compound in Russet Burbank potatoes.By contrast,Atlantic and Shepody potatoes contain considerable caffeic acid.The loss rate of phenolic compounds in Russet Burbank during dehydrated potato flake processing is 50.47%.展开更多
Glycoalkaloids（GAS） have important biological and pharmaceutical activities, in order to study the relationship between the structures and the activities of carbohydrate chains, two natural glycoalkaloids, chaconine...Glycoalkaloids（GAS） have important biological and pharmaceutical activities, in order to study the relationship between the structures and the activities of carbohydrate chains, two natural glycoalkaloids, chaconine （compound 1 ） and solanine（ compound 2） , were isolated from potato stems and leaves（ Solanum tuberosum L. ）. The selective sulfation to the 6-hydroxy groups of chaeonine and solanine was carried out in a strategy by the use of protective groups. The 6-hydroxyl groups of the sugar chains in chaconine and solanine were protected with 4,4＇-dimethoxytrityl（DMT） while the other hydroxyl groups were acetylated. The protective group DMT was removed by using 0. 5% TFA in dichloromethane, The free 6-hydroxyl groups were sulfated by chlorosulfonic acid pyridine to give 6-O-sulfated products. After the acetyl groups were removed, the final products obtained were sulfated chaconine and sulfated solanine.^ 13C NMR spectra confirmed that chaconine and solanine were sulfated at O6 of the carbohydrate moiety.展开更多
建立了超高效液相色谱-三重四极杆质谱联用方法，检测血浆和尿液中的α-龙葵碱、α-卡茄碱和茄啶。样品经2％（v / v，下同）甲酸水溶液等量稀释，再经混合型阳离子交换固相萃取柱（MCX SPE）净化，以0.1％甲酸乙腈溶液和含0.05％甲酸的...建立了超高效液相色谱-三重四极杆质谱联用方法，检测血浆和尿液中的α-龙葵碱、α-卡茄碱和茄啶。样品经2％（v / v，下同）甲酸水溶液等量稀释，再经混合型阳离子交换固相萃取柱（MCX SPE）净化，以0.1％甲酸乙腈溶液和含0.05％甲酸的5 mmol / L 乙酸铵水溶液作为流动相进行梯度洗脱，在 UPLC BEH C 18色谱柱上实现分离，正离子电喷雾串联质谱多反应监测（ESI-MS / MS MRM）方式检测，基质匹配外标法定量。一次进样分析时间为5.5 min。血浆和尿液中3种待测物的线性范围均为0.3~100 ng / mL，相关系数为0.997~0.999；样品的检出限为0.1 ng / mL，定量限为0.3 ng / mL；血浆和尿液中的平均加标回收率分别为82％~112％和96％~114％，相对标准偏差为4.0％~16％和2.7％~17％（n ＝6）。方法简单、准确、灵敏，适用于马铃薯中毒检测。展开更多
基金This work was supported by the China Agriculture Research System(CARS-10)the National Key Research and Development Plan(2016YFD0401302-02)+2 种基金the Science and Technology Major Project of Gansu Province(1602NKDJ022-1)the Natural Science Foundation of Gansu Province(1501RJZA004)the Science and Technology Planing Project of Lanzhou(2016-3-123).
文摘In order to investigate the food nutrition and safety of potato,the objective of the present study is to quantify glycoalkaloids(-chaconine and-solanine)and phenolic compounds in three potato cultivars,namely,Russet Burbank,Atlantic,and Shepody,grown in Hebei,China,and these two classes of biologically active compounds in commercial dehydrated potato flakes were also investigated.The total glycoalkaloid levels in whole potatoes ranged from 4.72 mg/kg for Shepody potatoes to 34.45 mg/kg for Russet Burbank potatoes.The ratio of-chaconine to-solanine in whole potatoes ranged from 0.41 for Russet Burbank potatoes to 3.61 for Atlantic potatoes.The removal rate of total glycoalkaloids in Russet Burbank potatoes during dehydrated potato flake processing is 90.0%.Chlorogenic acid is the dominant phenolic compound in Russet Burbank potatoes.By contrast,Atlantic and Shepody potatoes contain considerable caffeic acid.The loss rate of phenolic compounds in Russet Burbank during dehydrated potato flake processing is 50.47%.
文摘Glycoalkaloids（GAS） have important biological and pharmaceutical activities, in order to study the relationship between the structures and the activities of carbohydrate chains, two natural glycoalkaloids, chaconine （compound 1 ） and solanine（ compound 2） , were isolated from potato stems and leaves（ Solanum tuberosum L. ）. The selective sulfation to the 6-hydroxy groups of chaeonine and solanine was carried out in a strategy by the use of protective groups. The 6-hydroxyl groups of the sugar chains in chaconine and solanine were protected with 4,4＇-dimethoxytrityl（DMT） while the other hydroxyl groups were acetylated. The protective group DMT was removed by using 0. 5% TFA in dichloromethane, The free 6-hydroxyl groups were sulfated by chlorosulfonic acid pyridine to give 6-O-sulfated products. After the acetyl groups were removed, the final products obtained were sulfated chaconine and sulfated solanine.^ 13C NMR spectra confirmed that chaconine and solanine were sulfated at O6 of the carbohydrate moiety.
文摘建立了超高效液相色谱-三重四极杆质谱联用方法，检测血浆和尿液中的α-龙葵碱、α-卡茄碱和茄啶。样品经2％（v / v，下同）甲酸水溶液等量稀释，再经混合型阳离子交换固相萃取柱（MCX SPE）净化，以0.1％甲酸乙腈溶液和含0.05％甲酸的5 mmol / L 乙酸铵水溶液作为流动相进行梯度洗脱，在 UPLC BEH C 18色谱柱上实现分离，正离子电喷雾串联质谱多反应监测（ESI-MS / MS MRM）方式检测，基质匹配外标法定量。一次进样分析时间为5.5 min。血浆和尿液中3种待测物的线性范围均为0.3~100 ng / mL，相关系数为0.997~0.999；样品的检出限为0.1 ng / mL，定量限为0.3 ng / mL；血浆和尿液中的平均加标回收率分别为82％~112％和96％~114％，相对标准偏差为4.0％~16％和2.7％~17％（n ＝6）。方法简单、准确、灵敏，适用于马铃薯中毒检测。
