| 单词 | saponification value |
| 释义 | > as lemmassaponification value b. saponification equivalent, a ‘term signifying the number of grammes of any oil saponified by one gramme of an alkali’ ( New Sydenham Soc. Lexicon 1897); now usually defined in terms of the amount of alkali required to saponify a particular quantity of oil, spec. the number of milligrammes of potassium hydroxide required by one gramme of oil; also saponification number, saponification value. ΘΚΠ the world > matter > chemistry > chemical reactions or processes > [noun] > chemical reactions or processes (named) > saponification > saponification equivalent saponification number1877 1877 in C. A. Moloney Sketch Forestry W. Afr. (1887) 49 Saponification equivalent [of palm oil from] Brass 280·2. 1895 T. H. Pearmain & C. G. Moor Aids to Anal. of Food & Drugs 89 The saponification value of an oil may be stated in terms of alkali absorbed per cent., or the number of grammes of the oil which would be saponified by one litre of normal solution of alkali, which is usually known as the ‘saponification equivalent’. 1896 Analyst XXI. 192 The ether value thus obtained, added to the acid value, gave the saponification number. 1944 Industr. & Engin. Chem. (Analyt. ed.) 16 53 The indicator..is therefore recommended for use in the determination of acid numbers and saponification equivalents. 1946 F. Schneider Qualitative Org. Microanalysis vi. 163 For the identification of the acid portion of the ester use the titrated solution from the determination of the saponification equivalent. 1964 C. J. Boner Gear & Transmission Lubricants iii. 68 The saponification number divided by two will give a close approximation of the percentage of fat in a compounded oil. 1975 Materials & Technol. VIII. i. 17 The saponification value..expressed as the number of milligrams of potassium hydroxide required to saponify one gram of fat. < as lemmas |
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