化学学报 ›› 1957, Vol. 23 ›› Issue (1): 14-18. 上一篇    下一篇

论文

示差折光计

钱人元, 沈寿彭, 施良和, 吴人洁, 张德龢   

  1. 中国科学院化学研究所
  • 投稿日期:1956-10-10 发布日期:2013-06-03

A DIFFERENTIAL REFRACTOMETER

CHIEN JEN-YUAN, SHEN SHOW-PENG, SHIH LIANG-Ho, WU JEN-CHIH, CHANG TEH-Ho   

  1. Institute of Chemistry, Academia Sinica, Peking
  • Received:1956-10-10 Published:2013-06-03

本示差折光计的设计是基于光线在两液体界面间折射的原理.准直的单色光线经过浸在溶剂中的溶液稜镜时产生的偏折,经长焦距成像镜放大隙缝光源的像移,用读数显微镜观察.成像镜前面有两个双隙缝使在成像处产生干涉条纹来减小像的宽度,使像移可更精确的测定.仪器经用标准溶液校正,灵敏度可达Δn=2.5×10-6.并着重讨论了恒温、折射池设计和标准液挑选对测定的影响.利用这架示差折光计在使用单色光λ436和546mμ时,测定了聚甲基丙烯酸甲酯等七个高分子溶液和有机化合物溶液的(dn)/(dc).

The differential refractometer described here was designed on the principle of light refraction at two liquid interfaces.A beam of monochromatic light (436 or 546 mgt) passing through a hollow glass cell of square cross-section filled- with solution and immersed in the solvent was refracted.The displacement of the slit images of the rays passing through the two halves of the solution prism was magnified by a lens of long focal length.