日的:寻找一种测定溶液中维生素K,含量的新方法、方法:由修饰玻碳电极为工作电极的三电极体系,用锁相交流溶出伏安法进行测定。结果:峰电流(ip)与维生素K1的浓度(c)在7.21 X 10-7g/ml～8.11×l0-6 g/ml范围内呈现良好的线性关系,检...日的:寻找一种测定溶液中维生素K,含量的新方法、方法:由修饰玻碳电极为工作电极的三电极体系,用锁相交流溶出伏安法进行测定。结果:峰电流(ip)与维生素K1的浓度(c)在7.21 X 10-7g/ml～8.11×l0-6 g/ml范围内呈现良好的线性关系,检出限为7.8×10-8g/ml。结论:该方法与其它方法相比,简便、快捷。展开更多
The Ruettimnann’ s method[5] for vitamin K1 synthesis has been improved by usingphase transfer catalyst in Diels-Alder condensation and using mixed trans-cis phytyl chlorideinstead of natural phytol as starting mater...The Ruettimnann’ s method[5] for vitamin K1 synthesis has been improved by usingphase transfer catalyst in Diels-Alder condensation and using mixed trans-cis phytyl chlorideinstead of natural phytol as starting material in the synthesis. The vitamin K1 then obtainedby a retro-Diels-Alder reaction has a cis-trans isomer ratio of 20. 35 to 79. 65 which meets theChinese pharmacopia standard. Phytyl bromide in this case gave vitamin K1 with cis-trans ratio of 26. 30 to 73. 70.展开更多
文摘日的:寻找一种测定溶液中维生素K,含量的新方法、方法:由修饰玻碳电极为工作电极的三电极体系,用锁相交流溶出伏安法进行测定。结果:峰电流(ip)与维生素K1的浓度(c)在7.21 X 10-7g/ml～8.11×l0-6 g/ml范围内呈现良好的线性关系,检出限为7.8×10-8g/ml。结论:该方法与其它方法相比,简便、快捷。
文摘The Ruettimnann’ s method[5] for vitamin K1 synthesis has been improved by usingphase transfer catalyst in Diels-Alder condensation and using mixed trans-cis phytyl chlorideinstead of natural phytol as starting material in the synthesis. The vitamin K1 then obtainedby a retro-Diels-Alder reaction has a cis-trans isomer ratio of 20. 35 to 79. 65 which meets theChinese pharmacopia standard. Phytyl bromide in this case gave vitamin K1 with cis-trans ratio of 26. 30 to 73. 70.
