THE CONTROL OF ERRORS IN INFRARED SPECTROPHOTOMETRY .6. THE EVALUATION OF OPTICAL-CONSTANTS BY COMBINED TRANSMISSION AND ATTENUATED TOTAL REFLECTION MEASUREMENTS

被引:39
作者
GOPLEN, TG [1 ]
CAMERON, DG [1 ]
JONES, RN [1 ]
机构
[1] TOKYO INST TECHNOL,DEPT CHEM,MEGURO KU,TOKYO 152,JAPAN
关键词
OPTICAL VARIABLES MEASUREMENT;
D O I
10.1366/0003702804731050
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
An improved technique is described for the determination of the optical constants of liquids in the infrared. It is based on a combination of transmission and attenuated total reflection (ATR) measurements. A novel application of the Kramers-Kronig transform function is involved whereby a single-valued integration constant is derived from a vector of refractive index measurements obtained by ATR. These are measured over a wavenumber range where the absorbance is low. The accuracy of the method is evaluated on the basis of a statistical treatment of the propagation of the estimated errors in the experimentally measured quantities, viz. , the transmittance, the cell thickness, and the ATR measurements which establish the integration constant (anchor point) of the Kramers-Kronig transform function.
引用
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页码:652 / 656
页数:5
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