英语词汇“spot test”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

spot test n. (a) a chemical test performed using a single drop or very small sample of the substance to be tested, typically with a reagent that produces a characteristic colour change or precipitate; (b) a test or inspection made on a random or representative sample, or one made without prior warning (cf. spot check n.).

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the world > matter > chemistry > chemical tests > [noun] > types

field trial1817

spot test1872

indentation test1897

spot testing1900

reductase test1910

Scoville test1921

the world > action or operation > endeavour > trial or experiment > trial, test, or testing > [noun] > test or testing for truth or correctness > quick check on random sample

spot test1872

spot check1918

spot-checking1919

1872 Trial Elizabeth Wharton (Baltimore Gaz.) 84/1 The spot test is not deemed of importance in giving the arsenic or antimony in sufficient quantity to test for the metals.

1921 Chem. Abstr. 15 2599 Spot tests which depend upon the formation of PbCrO₄ or of AgCrO₄ are fairly sensitive.

1928 Rep. 21st National Conf. Weights & Meas. (U.S. Dept. of Commerce) 50 This weight is about all that a man would care to move around on a scale platform in making ‘spot’ tests.

1955 Times 16 June 9/3 ‘Spot tests’ could be extended, and it would be well if the Minister were to declare his intention with regard to them.

1960 Jrnl. Iron & Steel Inst. 194 285/3 For Cu, a spot test is suggested which allows estimation in the range 0·1–0·5 p.p.m.

2012 J. Brown Afr. Amer. Women Chemists 105 Dr. Harris's major projects at Los Alamos Laboratory have included the development of a spot test for identifying explosives.

单词	spot test
释义	> as lemmas spot test spot test n. (a) a chemical test performed using a single drop or very small sample of the substance to be tested, typically with a reagent that produces a characteristic colour change or precipitate; (b) a test or inspection made on a random or representative sample, or one made without prior warning (cf. spot check n.). ΘΚΠ the world > matter > chemistry > chemical tests > [noun] > types field trial1817 spot test1872 indentation test1897 spot testing1900 reductase test1910 Scoville test1921 the world > action or operation > endeavour > trial or experiment > trial, test, or testing > [noun] > test or testing for truth or correctness > quick check on random sample spot test1872 spot check1918 spot-checking1919 1872 Trial Elizabeth Wharton (Baltimore Gaz.) 84/1 The spot test is not deemed of importance in giving the arsenic or antimony in sufficient quantity to test for the metals. 1921 Chem. Abstr. 15 2599 Spot tests which depend upon the formation of PbCrO₄ or of AgCrO₄ are fairly sensitive. 1928 Rep. 21st National Conf. Weights & Meas. (U.S. Dept. of Commerce) 50 This weight is about all that a man would care to move around on a scale platform in making ‘spot’ tests. 1955 Times 16 June 9/3 ‘Spot tests’ could be extended, and it would be well if the Minister were to declare his intention with regard to them. 1960 Jrnl. Iron & Steel Inst. 194 285/3 For Cu, a spot test is suggested which allows estimation in the range 0·1–0·5 p.p.m. 2012 J. Brown Afr. Amer. Women Chemists 105 Dr. Harris's major projects at Los Alamos Laboratory have included the development of a spot test for identifying explosives. extracted from spotn.¹adv. < as lemmas
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> as lemmas