saponificationn.

/səˌpɒnɪfɪˈkeɪʃən/

Etymology: < French saponification, < saponifier saponify v.: see -fication suffix.

a. The process of saponifying; the decomposition of a fat by the addition of an alkali which combines with its fatty acids to form a soap, the remaining constituent, glycerine, being consequently liberated.

ΘΚΠ

the world > matter > chemistry > chemical reactions or processes > [noun] > chemical reactions or processes (named) > saponification

saponification1821

1821 A. Ure Dict. Chem. at Fat Saponification of the Elaines by potash.

1836–41 W. T. Brande Man. Chem. (ed. 5) 1137 The general results of saponification.

1884 J. Paton in Encycl. Brit. XVII. 740/2 The saponification of stearin with sodic hydrate.

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.

c. (See quot. 1877.)

ΘΚΠ

the world > matter > condition of matter > bad condition of matter > [noun] > decomposition, melting, or crumbling away > as a consequence of death > specific

saponification1877

1877 Littlejohn in Encycl. Brit. VII. 475/1 On the other hand, in cool weather the progress of liquefaction [of a corpse] is arrested, and the soft parts become solidified, owing to their conversion into adipocire, a peculiar kind of animal soap. To this stage..Devergie gives the name of saponification.

1882 Tidy Legal Med. I. 115 Partial saponification may be expected..after three months' submersion in water, and after twelve months' burial in earth.

This entry has not yet been fully updated (first published 1909; most recently modified version published online June 2018).

单词	saponification
释义	saponificationn. /səˌpɒnɪfɪˈkeɪʃən/ Etymology: < French saponification, < saponifier saponify v.: see -fication suffix. a. The process of saponifying; the decomposition of a fat by the addition of an alkali which combines with its fatty acids to form a soap, the remaining constituent, glycerine, being consequently liberated. ΘΚΠ the world > matter > chemistry > chemical reactions or processes > [noun] > chemical reactions or processes (named) > saponification saponification1821 1821 A. Ure Dict. Chem. at Fat Saponification of the Elaines by potash. 1836–41 W. T. Brande Man. Chem. (ed. 5) 1137 The general results of saponification. 1884 J. Paton in Encycl. Brit. XVII. 740/2 The saponification of stearin with sodic hydrate. 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. c. (See quot. 1877.) ΘΚΠ the world > matter > condition of matter > bad condition of matter > [noun] > decomposition, melting, or crumbling away > as a consequence of death > specific saponification1877 1877 Littlejohn in Encycl. Brit. VII. 475/1 On the other hand, in cool weather the progress of liquefaction [of a corpse] is arrested, and the soft parts become solidified, owing to their conversion into adipocire, a peculiar kind of animal soap. To this stage..Devergie gives the name of saponification. 1882 Tidy Legal Med. I. 115 Partial saponification may be expected..after three months' submersion in water, and after twelve months' burial in earth. This entry has not yet been fully updated (first published 1909; most recently modified version published online June 2018). < n.1821
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