| 释义 |
turbidimeter Chem. and Biol.|tɜːbɪˈdɪmɪtə(r)|
[f. turbid a. + -i- + -meter.]
An instrument for determining the turbidity of a liquid from the decrease in the intensity of a beam of light passing through it.
1905Water Supply & Irrigation Papers (U.S. Geol. Survey) No. 151. 26 The needs of the Survey were found to be met in a satisfactory manner by the use of a turbidimeter devised by Mr. Daniel D. Jackson. 1920Jrnl. Biol. Chem. XLII. 191 Turbidimeters and nephelometers are instruments designed for practically the same purpose. 1973Sci. Amer. June 112/1 Extinction turbidimeters are doubtless the simplest instruments that have been devised for measuring the concentration of solids in suspension. They are based on the principle that turbidity is inversely proportional to the minimum length that a column of fluid must have in order to extinguish at one end of the column a source of light at the other end.
Hence (all also turbido-) turbidiˈmetric a., obtained with or employing a turbidimeter; turbidiˈmetrically adv.; turbiˈdimetry, the use of a turbidimeter, esp. for the quantitative analysis of turbid solutions.
1911Jrnl. Industr. & Engin. Chem. III. 554/1 The discrepancies between the turbidimetric and gravimetric results..were..thought to be caused by the presence of nitrates in the solutions examined. 1918Jrnl. Biol. Chem. XXXVI. 33 This reagent gives quite good results used either turbidometrically or nephelometrically. 1920Ibid. XLII. 196 With several of the substances which have already been standardized for turbidimetry we can multiply the accuracy. 1943Jrnl. Bacteriol. XLVI. 377 Applications of turbidimetry to the study of in vitro penicillin effects. 1971Turbidimetric [see nephelometric adj. s.v. nephelo-]. 1975D. H. Burrin in Williams & Wilson Biologist's Guide to Princ. & Techniques Pract. Biochem. v. 145 Very dilute suspensions may be assayed by turbidometry. 1981Jrnl. Protozool. XXVIII. 371/2 Growth was determined turbidimetrically. |