Nesslern.

Brit.

/ˈnɛslə/, U.S.

/ˈnɛslər/

Origin: From a proper name. Etymon: proper name Neßler.

Etymology: < the name of Julius Neßler (1827–1905), German agricultural chemist (see below).

Chemistry.

1. Nessler test n. (also Nessler's test) a sensitive test devised by Nessler for the detection or measurement of ammonia in aqueous solution, involving the formation of a brown colour or precipitate with Nessler's reagent (see sense 2).

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the world > matter > chemistry > chemical tests > [noun] > reagents > Nessler's reagent > relevant test

Nessler test1865

1865 Jrnl. Chem. Soc. 18 125 The distillate is divided into two equal portions; one of these is submitted to Nessler's test for ammonia.

1946 Thorpe's Dict. Appl. Chem. (ed. 4) VII. 579/1 The action of ammonia on an alkaline solution of potassium mercuri-iodide..is the basis of the Nessler test for ammonia.

1965 Science 31 Dec. 1832/3 The precipitate was resuspended in..cold saline and dialyzed against tap water..until all the ammonium sulfate was removed, as determined by the Nessler test.

2. Nessler's reagent n. (also Nessler reagent) an alkaline solution of mercuric iodide and potassium iodide, containing HgI₄²⁻ ions, which gives a brown colour or precipitate when added to an aqueous solution containing ammonia. Similarly Nessler('s) solution.

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the world > matter > chemistry > chemical tests > [noun] > reagents > Nessler's reagent

Nessler('s) solution1868

1868 Jrnl. Chem. Soc. 21 87 Mr. Chapman..recommends that the ammonia determination should be made by the application of Nessler's solution directly to the water.

1873 Chem. News 11 July 13/2 One sample of Nessler reagent gives its maximum of colour almost immediately, and another takes a quarter of an hour or an hour.

1906 H. J. H. Fenton Notes Qualitative Anal. (new ed.) 23 Nessler's solution (potassium mercuric iodide with excess of caustic potash) gives, even in very dilute solutions, a brown or yellow coloration (or precipitate in stronger solutions) due to dimercuric-ammonium iodide.

1922 T. M. Lowry Inorg. Chem. xxvi. 383 Traces of ammonia in solution can be detected and estimated colorimetrically by Nessler's Reagent.

1984 N. N. Greenwood & A. Earnshaw Chem. of Elements (1986) xvii. 934 In analytical chemistry KH_gI₃ forms the basis for Nessler's reagent for the detection of NH₃.

1998 Agric. & Forest Meteorol. 90 265 Ammonia concentration was measured over a 2-3 h sampling period by trapping air NH₃ in a H₂SO₄ solution and analysing this sample in the laboratory with the colorimetric method using the Nessler solution.

3. Nessler tube n. a flat-bottomed glass cylinder marked with a line indicating a certain volume, used in the Nessler test and other colorimetric procedures.

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the world > matter > chemistry > equipment or apparatus > [noun] > general vessels > glass > others

urinalc1300

recipient1558

matrass1591

tritory1660

balloon1678

proof-glass1765

air-bell1782

transfer-jar1827

ignition tube1874

beaker1877

bell-jar1877

flask1878

steam-bomb1895

Nessler tube1906

oxygen bottle1932

the world > relative properties > measurement > measuring instrument > [noun] > for measuring volume > measuring vessels > glass tube marked with a line

Nessler tube1906

1906 Proc. Royal Soc. 1905–6 B. 77 422 A measured quantity of the fluid is then run into a Nessler tube.

1913 A. C. Cumming & S. A. Kay Text-bk. Quantitative Chem. Anal. iv. 156 Measure into a 100 c.c. Nessler tube a portion of the solution containing from 0·1 to 3 mgrm. of iron.

1963 D. A. Skoog & D. M. West Fund. Analyt. Chem. xxviii. 656 In its simplest form, colorimetry consists of visual matching of the color of the solutions of the substance with a set of standards. For such a procedure flat-bottomed tubes called Nessler tubes are frequently employed.

1975 Limnol. & Oceanogr. 20 271/1 Early samples were analyzed colorimetrically with Nessler tubes.

This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022).

单词	nessler
释义	Nesslern. Brit. /ˈnɛslə/, U.S. /ˈnɛslər/ Origin: From a proper name. Etymon: proper name Neßler. Etymology: < the name of Julius Neßler (1827–1905), German agricultural chemist (see below). Chemistry. 1. Nessler test n. (also Nessler's test) a sensitive test devised by Nessler for the detection or measurement of ammonia in aqueous solution, involving the formation of a brown colour or precipitate with Nessler's reagent (see sense 2). ΘΚΠ the world > matter > chemistry > chemical tests > [noun] > reagents > Nessler's reagent > relevant test Nessler test1865 1865 Jrnl. Chem. Soc. 18 125 The distillate is divided into two equal portions; one of these is submitted to Nessler's test for ammonia. 1946 Thorpe's Dict. Appl. Chem. (ed. 4) VII. 579/1 The action of ammonia on an alkaline solution of potassium mercuri-iodide..is the basis of the Nessler test for ammonia. 1965 Science 31 Dec. 1832/3 The precipitate was resuspended in..cold saline and dialyzed against tap water..until all the ammonium sulfate was removed, as determined by the Nessler test. 2. Nessler's reagent n. (also Nessler reagent) an alkaline solution of mercuric iodide and potassium iodide, containing HgI₄²⁻ ions, which gives a brown colour or precipitate when added to an aqueous solution containing ammonia. Similarly Nessler('s) solution. ΘΚΠ the world > matter > chemistry > chemical tests > [noun] > reagents > Nessler's reagent Nessler('s) solution1868 1868 Jrnl. Chem. Soc. 21 87 Mr. Chapman..recommends that the ammonia determination should be made by the application of Nessler's solution directly to the water. 1873 Chem. News 11 July 13/2 One sample of Nessler reagent gives its maximum of colour almost immediately, and another takes a quarter of an hour or an hour. 1906 H. J. H. Fenton Notes Qualitative Anal. (new ed.) 23 Nessler's solution (potassium mercuric iodide with excess of caustic potash) gives, even in very dilute solutions, a brown or yellow coloration (or precipitate in stronger solutions) due to dimercuric-ammonium iodide. 1922 T. M. Lowry Inorg. Chem. xxvi. 383 Traces of ammonia in solution can be detected and estimated colorimetrically by Nessler's Reagent. 1984 N. N. Greenwood & A. Earnshaw Chem. of Elements (1986) xvii. 934 In analytical chemistry KH_gI₃ forms the basis for Nessler's reagent for the detection of NH₃. 1998 Agric. & Forest Meteorol. 90 265 Ammonia concentration was measured over a 2-3 h sampling period by trapping air NH₃ in a H₂SO₄ solution and analysing this sample in the laboratory with the colorimetric method using the Nessler solution. 3. Nessler tube n. a flat-bottomed glass cylinder marked with a line indicating a certain volume, used in the Nessler test and other colorimetric procedures. ΘΚΠ the world > matter > chemistry > equipment or apparatus > [noun] > general vessels > glass > others urinalc1300 recipient1558 matrass1591 tritory1660 balloon1678 proof-glass1765 air-bell1782 transfer-jar1827 ignition tube1874 beaker1877 bell-jar1877 flask1878 steam-bomb1895 Nessler tube1906 oxygen bottle1932 the world > relative properties > measurement > measuring instrument > [noun] > for measuring volume > measuring vessels > glass tube marked with a line Nessler tube1906 1906 Proc. Royal Soc. 1905–6 B. 77 422 A measured quantity of the fluid is then run into a Nessler tube. 1913 A. C. Cumming & S. A. Kay Text-bk. Quantitative Chem. Anal. iv. 156 Measure into a 100 c.c. Nessler tube a portion of the solution containing from 0·1 to 3 mgrm. of iron. 1963 D. A. Skoog & D. M. West Fund. Analyt. Chem. xxviii. 656 In its simplest form, colorimetry consists of visual matching of the color of the solutions of the substance with a set of standards. For such a procedure flat-bottomed tubes called Nessler tubes are frequently employed. 1975 Limnol. & Oceanogr. 20 271/1 Early samples were analyzed colorimetrically with Nessler tubes. This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022). < n.1865
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