Cyclic Voltammetry Determination of Epinephrine with a Nano—gold Modified Glassy Carbon Electrode in the Presence of High Concentration Ascorbic Acid

As we know, there are usually some problems in electrochemical analysis with bare electrode to detect neurotransmitters. One is low electron transfer rate and the other is interfering compounds, such as ascorbic acid. So some kinds of modified electrodes have been successfully employed to promote the efficiency of electrochemical analysis1-4, such as Nafion modified electrode5,6 and SAM modified electrode7. They can attract positively-charged neurotransmitters while repulse negatively-cha…     

反相高效液相色谱法安培检测器快速测定人血清中维生素C含量

维生素C(下称VC)是维持人体健康的重要维生素之一。它广泛参与机体的氧化、还原和羟化等代谢过程,对维持机体正常生理功能具有重要作用。VC缺乏可导致坏血病和机体抗病能力降低。通过血清VC浓度测定,对坏血病的诊断和治疗,对于及时纠正VC缺乏及评价某些生理、病理条件下的机体状况具有重要的临床意义。VC的测定有紫外比色法,有HPLC-UV检测食品和体液中VC含量,但灵敏度低。还有反相离子对色谱法,而离子对试剂价格昂贵。本法具有简便、快速、灵敏等特点。     

维生素C的历史——从征服"海上凶神"到诺贝尔奖

This paper reviews the course of understanding vitamin C. From the "sea god" that sailors first encountered to the scurvy that caused the British Navy to suffer, understanding vitamin C is improved little by little. Until modern times, with the guidance of advanced theory and the rapid development of chemical research, human beings finally got to known vitamin C and conquered scurvy. This marks the arrival of a new era.