Exploration for teaching reformation of medical chemistry in the nursing major / 中华医学教育探索杂志

A series of reform on the teaching of medical chemistry has been carried out to improve the quality of instruction,which includes the goal of instruction,the content of course and the teaching method.Good results have been achieved.

Spectrophotometric Determination of Trace Germanium in Chinese Medicine by Hydride Generation Technique / 分析化学

The hydride generation technique was used to determination of germanium in the presence of L-cysteine.The GeH4 was absorbed and coloured by a mixed solution of 2-(5-NO2-2-pyridylazo)-5-diethylaminophenyl(5-NO2-PADAP),NaClO and (CH2)6NH+.The maximum absorption of the colour complex was at 564nm.Its apparent molar absorption coefficient was 1.84×105L·mol-1·cm-1.Beer＇s law was obeyed for 0～500μg/L germanium.The recoveries of spiked samples were in the range of 89%～97%,while the relative standard deviation was less than 6.3%.This method is sensitive,simple and reproducible.The method has been applied to the determination of Ge in the chinese medicine with satisfactory result.