reprecipitatev.

Brit.

/riːprᵻˈsɪpᵻteɪt/, U.S.

/ˌripriˈsɪpəˌteɪt/,

/ˌriprəˈsɪpəˌteɪt/

Origin: Formed within English, by derivation. Etymons: re- prefix, precipitate v.

Etymology: < re- prefix + precipitate v.

Chemistry.

1. transitive. To precipitate again (a substance which has previously been dissolved).

ΘΚΠ

the world > matter > chemistry > chemical reactions or processes > subject to chemical reactions or processes [verb (transitive)] > subject to named chemical reaction or process > subject to precipitation > subject to reprecipitation

reprecipitate1787

regenerate1854

1787 W. Marshall Rural Econ. Norfolk I. 25 A friable mass of yellowish-white quick-lime: which being re-dissolved and re-precipitated, regains its weight.

1842 E. A. Parnell Elements Chem. Anal. (1845) 293 It is soluble in cold acetic and dilute nitric acids, and is reprecipitated by ammonia.

1906 H. J. H. Fenton Notes Qualitative Anal. (new ed.) 10 This [precipitate] dissolves in ammonium sulphide, forming ammonium sulphostannate,..from which HCl reprecipitates SnS₂.

2008 Appl. Surface Sci. 254 5570/1 The polymer was redissolved and then reprecipitated into excess ether.

2. intransitive. To precipitate or be precipitated again.

ΚΠ

1824 Q. Jrnl. Sci. & Arts Apr. 167 Wash away the acid by pure water, and the pigment becomes soluble again; re-acidify, and it re-precipitates.

1894 Amer. Jrnl. Pharmacy 66 298 Lead tartrate is readily soluble in a solution of potassium citrate, from which, however, it soon reprecipitates on standing.

1962 Data of Geochem. (U.S. Geol. Surv.) (ed. 6) T1/1 Many authors report abundant evidence that silica deposited as skeletal remains or in volcanic ash dissolves, migrates, and reprecipitates during diagenesis.

1993 Caries Res. 27 365 Either the enamel mineral itself or apatite reprecipitated during the course of equilibration.

Derivatives

repreˈcipitated adj.

ΚΠ

1869 J. G. Sawkins Rep. Geol. Jamaica 33 The re-precipitated calcareous matters are thrown down from the surface waters.

1973 Physics of Solid Earth 1972 842/1 The study of the oriented magnetization of reprecipitated sediments makes..possible..the determination of the intensity of the ancient geomagnetic field.

1997 Atmospheric Environment 31 1297 High levels of calcium (Ca²⁺) ions, in the form of reprecipitated calcite, were recorded in the stone.

This entry has been updated (OED Third Edition, December 2009; most recently modified version published online June 2022).

单词	reprecipitate
释义	reprecipitatev. Brit. /riːprᵻˈsɪpᵻteɪt/, U.S. /ˌripriˈsɪpəˌteɪt/, /ˌriprəˈsɪpəˌteɪt/ Origin: Formed within English, by derivation. Etymons: re- prefix, precipitate v. Etymology: < re- prefix + precipitate v. Chemistry. 1. transitive. To precipitate again (a substance which has previously been dissolved). ΘΚΠ the world > matter > chemistry > chemical reactions or processes > subject to chemical reactions or processes [verb (transitive)] > subject to named chemical reaction or process > subject to precipitation > subject to reprecipitation reprecipitate1787 regenerate1854 1787 W. Marshall Rural Econ. Norfolk I. 25 A friable mass of yellowish-white quick-lime: which being re-dissolved and re-precipitated, regains its weight. 1842 E. A. Parnell Elements Chem. Anal. (1845) 293 It is soluble in cold acetic and dilute nitric acids, and is reprecipitated by ammonia. 1906 H. J. H. Fenton Notes Qualitative Anal. (new ed.) 10 This [precipitate] dissolves in ammonium sulphide, forming ammonium sulphostannate,..from which HCl reprecipitates SnS₂. 2008 Appl. Surface Sci. 254 5570/1 The polymer was redissolved and then reprecipitated into excess ether. 2. intransitive. To precipitate or be precipitated again. ΚΠ 1824 Q. Jrnl. Sci. & Arts Apr. 167 Wash away the acid by pure water, and the pigment becomes soluble again; re-acidify, and it re-precipitates. 1894 Amer. Jrnl. Pharmacy 66 298 Lead tartrate is readily soluble in a solution of potassium citrate, from which, however, it soon reprecipitates on standing. 1962 Data of Geochem. (U.S. Geol. Surv.) (ed. 6) T1/1 Many authors report abundant evidence that silica deposited as skeletal remains or in volcanic ash dissolves, migrates, and reprecipitates during diagenesis. 1993 Caries Res. 27 365 Either the enamel mineral itself or apatite reprecipitated during the course of equilibration. Derivatives repreˈcipitated adj. ΚΠ 1869 J. G. Sawkins Rep. Geol. Jamaica 33 The re-precipitated calcareous matters are thrown down from the surface waters. 1973 Physics of Solid Earth 1972 842/1 The study of the oriented magnetization of reprecipitated sediments makes..possible..the determination of the intensity of the ancient geomagnetic field. 1997 Atmospheric Environment 31 1297 High levels of calcium (Ca²⁺) ions, in the form of reprecipitated calcite, were recorded in the stone. This entry has been updated (OED Third Edition, December 2009; most recently modified version published online June 2022). < v.1787
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