| 释义 |
titrate, v. Chem.|ˈtɪtreɪt, ˈtaɪ-|
[f. F. titre-r in same sense (f. titre title, qualification, fineness of alloyed gold or silver; in Chem., proportioning of the fixed weight of a reagent which a given volume of a liquid contains in solution): see -ate3 6.]
trans. To ascertain the amount of a constituent in (a mixture, or (less usually) a compound) by volumetric analysis; i.e. by adding to a solution thereof of known proportion, a suitable reagent of known strength, until a point is reached at which reaction occurs or ceases.
1870G. E. Davis in Eng. Mech. 4 Mar. 605/2 In titrating iron solutions, the ferrocyanide is not used. 1872Watts Dict. Chem. VI. 154 It is easy by means of the latter to titrate sulphuric, oxalic, or any other acid with perfect certainty. 1899J. Cagney Jaksch's Clin. Diagn. i. (ed. 4) 4 Tauszk weighs the blood used, and titrates with tropæolin or litmus.
Hence tiˈtratable a., capable of being titrated; ˈtitrated ppl. a. = F. titré: see quot.; also ˈtitrate a. rare, titrated.
1863Intell. Observ. III. 457 Titrated solutions are thus named from the French, and signify their having a definite strength, or power, so that the action of precipitation or otherwise exerted by a given quantity is readily capable of arithmetical expression, and thus indicates the quantity of the substance acted upon. 1881Nature 6 Oct. 552/1 Determination of phosphoric acid by titrated liquors, by M. Perrot. 1885Athenæum 11 July 54/1 Dr. R. Dubois's apparatus for applying anæsthetics composed of titrate mixtures of chloroform and air was described on June 22nd..before the Academy of Sciences. 1919Jrnl. Physiol. LIII. 189 Duplicate estimations were made..of titratable acidity and ammonia by the method of Folin. 1929Amer. Jrnl. Physiol. LXXXVII. 538 During the experiments no marked change occurred in the titratable acid concentration of the urine. 1963[see end-point 1]. 1973Nature 14 Dec. 425/1 Calculation of the total titratable acid in the collected effluent. |