共查询到20条相似文献,搜索用时 539 毫秒
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Thermolysis of azocarboxylates has been investigated by e.s.r. Experimental evidence for the existence of conformational isomerism in acylnitroxides has been obtained. 相似文献
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Michela Sega Elena Amico di Meane Francesca Rolle 《Accreditation and quality assurance》2009,14(11):601-605
Metrology in chemistry has its own features, which distinguish it from classical metrology: due to the lack of primary methods
applicable in routine measurements, metrological traceability of measurement results can be achieved by using in a proper
way suitable certified reference materials (CRMs), which can assure a direct relation to a reference. This article deals with
the activity of the Italian National Institute of Metrological Research (Istituto Nazionale di Ricerca Metrologica—I.N.Ri.M.)
on the analysis of various polychlorinated biphenyls congeners in organic solution by means of gas-chromatography coupled
with mass spectrometry. The metrological traceability approach in the quantification step is pursued via calibration solutions
prepared by gravimetrically diluting a CRM. The uncertainty for the calibration solutions was evaluated taking into account
all the relevant contributions. 相似文献
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Sedinine is assigned the revised structure -which also represents the absolute configuration- on the basis of single-crystal X-ray crystallography. 相似文献
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Raphael J. F. Berger Michael Hartmann Pekka Pyykkoe Dage Sundholm Hubert Schmidbaur 《ChemInform》2001,32(32):no-no
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option. 相似文献
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