| 释义 |
absorptiˈometer
[f. L. absorpt-um or ? absorptiōn-em (see next) + -meter = Gr. µέτρον measure, measurer.]
1. An instrument for measuring the amount of absorption of gases in various liquids.
1879Wroblewski in Nature XXI. 191 The absorptiometer which I have constructed for the determination of the co-efficients of absorption, consists of glass throughout.
2. An apparatus for measuring colour-absorption by means of a photo-electric device.
1939Thorpe's Dict. Appl. Chem. III. 305/2 Moll, Burger and Reichert..have devised a ‘spectroscopic absorptiometer’ which can be used at any part of the photographable spectrum. 1947Nature 11 Jan. 50/2 Applications of the spectrograph and the photo-electric absorptiometer. 1953Electronic Engin. XXV. 212 The continuous flow self-balancing absorptiometer is an instrument for detecting and giving continuous indication of small changes in colour density of a liquor.
Hence abˌsorptioˈmetric a., of, pertaining to or involving an absorptiometer.
1909in Cent. Dict. Suppl. 1950Engineering 3 Mar. 240/2 The determination of silicon in plain carbon steels..by the absorptiometric method. 1956Nature 24 Mar. 550/2 Conventional absorptiometric methods of gas analysis.
Add: absorptiˈometry (also † absorpˈtimetry) n., the measurement of absorption of radiation.
1950M. G. Mellon (title) Analytical absorption spectroscopy. Absorptimetry and colorimetry. 1955C. R. N. Strouts et al. Analytical Chem. II. xxi. 648 Absorptiometry may be defined as the measurement of optical density or of percentage transmission of light. 1973Nature 20 July 186/1 Emission applications are far more important and consequently reduced the discussion on absorptiometry—a technique with important but limited applications. 1989Brit. Med. Jrnl. 19 Aug. 478/1 The trabecular bone contents of the lumbar spine and the total skeleton, measured by dual photon absorptiometry, are roughly 60{pcnt} and 20{pcnt}, respectively. |