ISSN:0049-8246    

DOI:10.1002/xrs.1300030311

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1974

数据来源: WILEY

ISSN:0049-8246    

DOI:10.1002/xrs.1300030313

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1974

数据来源: WILEY

ISSN:0049-8246    

DOI:10.1002/xrs.1300030314

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1974

数据来源: WILEY

ISSN:0049-8246    

DOI:10.1002/xrs.1300030302

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1974

数据来源: WILEY

摘要:

AbstractFluorescence crossed effects are discussed as to their exact significance, and relative importance regarding quantitative analysis. While they do not occur in binary systems, crossed effects appear when a fluorescent element is influenced by two or more interfering elements, more particularly when it is subject toenhancementeffects. Dissociating crossed effects from pure binary interactions enabled us to establish an accurate general equation for expressing interelement effects in accordance with fundamental theory, and then the associated corrections in any analytical system. As a rule, practical applications should include some suitable modification of the general formula, with respect to the magnitude of corrections for the particularsystem considered.

ISSN:0049-8246    

DOI:10.1002/xrs.1300030303

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1974

数据来源: WILEY

摘要:

AbstractAn X‐ray fluorescence method for the determinatios of lead, titanium, zirconium and strontium oxides in lead zirconate‐titanate has been developed. The method is a simple empirical correction procedure and requires only one standard containing all the elements analyzed. Moreover, the method does not require prior determination of correction factors obtained by a complex calculation, a multiple regression procedure, or from use of a considerable number of well analyzed standa

ISSN:0049-8246    

DOI:10.1002/xrs.1300030304

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1974

数据来源: WILEY

摘要:

AbstractThe problem presented by a multiphase metal system is studied, where one element is able to migrate from one phase of the alloy to another due to different states of heat treatment. The experimental work was performed on the simple Al + Si system; the results demonstrate that in extreme cases relative analytical errors of 400% may be accumulated if the ‘metallurgical history’ of sample and standard is neglected. The Claisse‐Samson particle size formulae for powder samples are applied to the grain size of the phases present in the allows with good agriment, and may be used to predict whether analytical problems are to be exp

ISSN:0049-8246    

DOI:10.1002/xrs.1300030305

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1974

数据来源: WILEY

摘要:

AbstractMany of the equation systems proposed for calculating elemental composition by X‐ray fluoresence spectrometry are overdetermined. In the present work an attempt has been made to overcome this difficulty by reducing the problem outlined to an eigenvalue on

ISSN:0049-8246    

DOI:10.1002/xrs.1300030306

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1974

数据来源: WILEY

摘要:

AbstractEs wird eine Methods zur eichprobenfreien Rötgenfluoreszenzanalyse beschrieben. Der Vergleich mit Reinelementstandards kann dabci entfallen, da das Zählratenverhältnis von je zwei Reinelementen als Gerätefunktion definiert wird. Durch Verwendung der Zählratenverhältnisse jeweils zweier Elemente der unbekannten Probe wird zusammen mit der Methode des variablen Beobachtungswinkels die quantitaive Zusammensetzung erh

ISSN:0049-8246    

DOI:10.1002/xrs.1300030307

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1974

数据来源: WILEY

摘要:

AbstractA technique has been developed for the measurement of lead in gasoline in the range 0.002 to 5 g/U.S. gal. The method is based on the use of Campton Scattering as an internal standard, and on a comparison of the unknown with a blank and with a standard solution. A correction procedure has been devised which takes into account the dependence of the analysis on the carbon‐hydrogen ration of the gasoline. The method has an accuracy, for a single measurement, of ± 0.002 at the 0.002 g/U.S. gal. level to ± 0.1 at the 5 g/U.S. gal. le

ISSN:0049-8246    

DOI:10.1002/xrs.1300030308

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1974

数据来源: WILEY