利用微波法合成二氧化钛纳米管

Titania nanotubes were synthesized by microwave method. The effects of raw materials, reaction time, NaOH solution concentration, and microwave power were studied. The samples were investigated by means of TEM, XRD, ICP techniques. Titania nanotubes having a hollow structure with an opening end were synthesized in NaOH solution (9~11 mol·L^-1) heated by 195 W microwave for over 60 min. The length of the titania nanotubes was about 1 μm and the average diameter of the nanotubes was about 8~10 nm.     

分析666、DDT残留量的快速色谱柱

有机氯农药系多组份的混合物,且它们之间互为异构体或代谢物,这给分离工作带来一定的困难.自从Thompson等报导用1.5％OV-17/1.95％QF-1涂制色谱柱以来,国内外推荐的方法或标准方法中普遍采用这种柱子进行有机氯农药的气相色谱分析。其结果,8个组份全分离需15至20分钟,而涂得差的柱子,难分离物质对还不能完全分离。前两年曾