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分光光度法测定钒酸钇晶体原料中的含钇量 被引量:1
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作者 林树坤 陈丽华 +1 位作者 张莉珍 王建春 《福州大学学报(自然科学版)》 CAS CSCD 2002年第6期877-879,共3页
在不同pH值下 ,通过液相法合成了钒酸钇晶体原料 .采用分光光度法测定了上述合成原料中的含钇量 .实验结果表明 ,pH =7.0时为原料合成的最佳酸碱度 ,原料中的含钇量可达 99.39% ,与理论值接近 .可作为优质YVO4
关键词 含钇量 分光光度法 钒酸晶体 测定 双折射晶体材料 酸碱度
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Application of Y2O3 nanoparticles on reducing the content of tar in cigarettes
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作者 YANG Zhi-hong YANG Zhi-yu +3 位作者 YU Xiao-bin XU Fei-guang WANG Chang-long NIE Ji-lan 《Journal of Chemistry and Chemical Engineering》 2007年第1期17-20,共4页
Y2O3 nanoparticles prepared in microemulsion, which were sprayed on cut tobacco, can reduce tar in cigarettes effectively. Reducing the content of tar in many brands of cigarettes was studied. The results show that Y2... Y2O3 nanoparticles prepared in microemulsion, which were sprayed on cut tobacco, can reduce tar in cigarettes effectively. Reducing the content of tar in many brands of cigarettes was studied. The results show that Y2O3 nanoparticles can reduce tar in cigarettes effectively and have no influence on nicotine when the addition of Y2O3 nanoparticles is 0,5-1.2%. The smaller the grain size of Y2O3 nanoparticles is,the more effective tar reduction is. The principle of reducing tar in cigarettes is studied preliminarily. 展开更多
关键词 Y2O3 nanoparticles CIGARETTE tar content
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