| 单词 |
microanalysis |
| 释义 |
microanalysis|maɪkrəʊəˈnælɪsɪs|
[f. micro- 2 a + analysis.]
The analysis for chemical information of very small samples, or very small areas of an object; now spec. the quantitative analysis of samples weighing only a few milligrammes (contrasted with semimicroanalysis and ultramicroanalysis). Cf. micro- 8 b.
1856Highley in Q. Jrnl. Microsc. Sci. IV. 224 Micro-Analysis. 1904tr. Osmond's Microsc. Anal. Metals 65 (heading) Micro-analysis of carbon steels. 1937Discovery Aug. 227/2 The addition..of the delicate weapon of micro-analysis to the analyst's armoury. 1966D. G. Brandon Mod. Techniques Metallogr. iii. 172 In all the methods of microanalysis discussed so far, a point-by-point determination of the x-ray emission or absorption spectrum is related to the chemical composition in order to find the spatial distribution of the components.
Hence microˈanalyst, one who performs or is skilled in microanalysis; ˌmicroanaˈlytical a., of or using microanalysis.
1924E. Fyleman tr. Pregl's Quantitative Org. Microanalysis i. 4 He has worked out a microanalytical method for the determination of glycerine. Ibid. ii. 13 A watch-maker's lens..should always be in the pocket of the microanalyst. 1938Ann. Reg. 1937 354 Paneth and Glückauf showed, by microanalytical methods, that when neutrons are produced by bombarding beryllium with gamma-rays the beryllium..breaks down into helium. 1964N. G. Clark Mod. Org. Chem. xxiv. 496 He later returned to Graz, where he established an international reputation as a micro-analyst. |
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