| 单词 |
Fehling |
| 释义 |
Fehling|ˈfeɪlɪŋ|
The name of Hermann von Fehling (1812–1885), German chemist, used attrib. or in the possessive to designate an alkaline solution of cupric sulphate and Rochelle salt used in sugar analysis; also ellipt. Hence Fehling('s) reaction, Fehling test.
1873Jrnl. Chem. Soc. XI. 265 The crystals, which are permanent in the air, neither hygroscopic nor efflorescent, are recommended by the author for the titration of Fehling's solution. 1887Encycl. Brit. XXII. 624/1 Every c.c. of Fehling solution oxidises about 5 milli-grams..of dextrose. 1909Cent. Dict. Suppl. 464/3 Fehling's reagent, test. 1946Nature 31 Aug. 295/2 The distillate slightly reduced Fehling's solution. 1954Thorpe's Dict. Appl. Chem. (ed. 4) XI. 203/2 Soxhlet's Fehling solution in excess is boiled with sugar solution. Ibid. 205/2 Into a flask of 300–400 ml. capacity, measure 10 ml. or 25 ml. of Fehling. 1960A. E. Bender Dict. Nutrition 48/2 Fehling's test, for reducing substances, mostly used to distinguish reducing from non-reducing sugars. |
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