X-ray Fluorescence Analysis in Weed Science

Weed Science ◽  
1975 ◽  
Vol 23 (5) ◽  
pp. 373-377 ◽  
Author(s):  
R. H. Falk ◽  
F. D. Hess ◽  
D. E. Bayer
Keyword(s):  
Distribution Pattern ◽  
Information Content ◽  
Fluorescence Analysis ◽  
Spatial Localization ◽  
New Method ◽  
Prunus Domestica ◽  
X Ray ◽  
Distribution Maps ◽  
Herbicide Residue ◽  
Leaf Surfaces

X-ray fluorescence analysis (XFA) is a new method for the spatial localization and quantification of herbicide residue on leaf surfaces. The distribution pattern of propanil (3′,4′-dichloropropionanilide) on the surface of prune (Prunus domesticaL.) leaves sprayed to simulate drift is easily mapped using XFA. Residue distribution maps may be electronically enhanced. Enhancement does not qualitatively change the information content of the map when done with discretion.

A method for determining the CEC and chemical composition of clays via XRF

Clay Minerals ◽  
2006 ◽  
Vol 41 (3) ◽  
pp. 717-725 ◽  
Author(s):  
S. Battaglia ◽  
L. Leoni ◽  
F. Sartori
Keyword(s):  
Matrix Effects ◽  
Fluorescence Analysis ◽  
Correction Method ◽  
Exchange Capacity ◽  
New Method ◽  
Chemical Compositions ◽  
Wet Chemistry ◽  
X Ray ◽  
Accuracy And Precision ◽  
Source Clays

AbstractA new method for determining the cation exchange capacity (CEC) of clays is proposed. The method is based on X-ray fluorescence analysis of natural and Ba-exchanged clays following the analytical procedure suggested by Franzini et al. (1975). This procedure, which utilizes powder pellets and is based on a full matrix correction method, is frequently applied in Earth Sciences laboratories for the routine analysis of minerals and rocks. For the analysis of Ba-exchanged clays, Franzini's procedure has been modified slightly to account for the contribution of Ba to matrix effects.The new method, which furnishes both the CEC and the chemical compositions of the whole natural clay samples, has been tested on the eight ‘Source Clays’ of The Clay Minerals Society. The results compare well with data reported in the literature and confirm the accuracy and precision of the method and make it a valid alternative to techniques based on wet chemistry, execution of which is usually more time-consuming and which often requires greater analytical skill.

A new method of depth sensitive micro-X-ray fluorescence analysis

2006 ◽  
Vol 248 (1) ◽  
pp. 142-149 ◽  
Author(s):  
A. Bjeoumikhov ◽  
S. Bjeoumikhova ◽  
R. Wedell ◽  
R. Gubzhokov ◽  
Z. Margushev
Keyword(s):  
Fluorescence Analysis ◽  
New Method ◽  
X Ray

A New Method for Quantitative X-Ray Fluorescence Analysis of Mixtures of Oxides or Other Compounds by Empirical Parameter Methods

1982 ◽  
Vol 26 ◽  
pp. 351-354 ◽  
Author(s):  
Michael Mantler
Keyword(s):  
Computer Program ◽  
Chemical Elements ◽  
Fluorescence Analysis ◽  
Theoretical Background ◽  
New Method ◽  
Fundamental Parameter ◽  
Mathematical Methods ◽  
Empirical Parameter ◽  
X Ray ◽  
New Type

Two principal mathematical methods are used for quantitative XRFA: fundamental parameter calculations and the evaluation of empirical parameter equations. A comprehensive computer program based upon fundamental parameter equations was introduced in 1976 by D. Laguitton and M. Mantler (LAMA-I) and improved by T. C. Huang in 1979 (LAMA-II). The present paper describes the features of the theoretical background of a computer program using a new type of empirical (alpha*-) parameter equations. It is essentially designed for convenient analysis of compounds including those containing chemical elements, that cannot be directly measured by conventional X-ray spectrometers, such as oxides, nitrides, and others. The program also communicates automatically with LAMA in order to establish theoretical tables of alpha*-coefficients as well as conventional alpha-coefficients.

Quantitative verification of 1 : 100 diluted fused glass beads for X-ray fluorescence analysis of geological specimens

2020 ◽  
Vol 35 (12) ◽  
pp. 2826-2833
Author(s):  
Ding-Shuai Xue ◽  
Ben-Xun Su ◽  
Dan-Ping Zhang ◽  
Yan-Hong Liu ◽  
Ju-Jie Guo ◽  
...  
Keyword(s):  
Preparation Method ◽  
Fluorescence Analysis ◽  
Small Sample ◽  
Glass Beads ◽  
New Method ◽  
Icp Oes ◽  
Acid Attack ◽  
X Ray ◽  
Accuracy And Precision ◽  
Quantitative Verification

This paper proposed a semi-automated small sample (30 mg) preparation method. The accuracy and precision of this new method were verified by measuring two CRMs among XRF, ICP-OES (fusion), and ICP-OES (acid attack) tools.

scholarly journals Non-Ferrous Metals and their Alloys in Medieval Pskov (Preliminary Results of a Research)

2018 ◽  
pp. 32-41
Author(s):  
Э. В. Королёва
Keyword(s):  
Full Range ◽  
Fluorescence Analysis ◽  
New Method ◽  
Technological Properties ◽  
X Ray ◽  
Preliminary Results ◽  
Production Location ◽  
Ferrous Metals ◽  
Non Ferrous Metals

В статье описывается новая методика количественной и качественной обработки данных о средневековом металле, полученных методом РФА, для выявления местной продукции путем соотнесения состава сырьевого металла и готовых изделий. Идея о необходимости такого сравнения основана на сделанном ранее выводе о приоритетном использовании в псковских мастерских готового сырьевого металла без попыток повлиять на его технологические свойства путем легирования. Применение методики имеет смысл только при наличии в изучаемой выборке значительного количества предметов широкого хронологического диапазона и представленных полным спектром категорий: от сырьевого металла, заготовок и полуфабрикатов до готовых изделий. Существенным условием является происхождение материала из комплексов, в том числе производственных. Предлагаемая методика включает в себя несколько этапов, часть из которых уже выполнена на псковском материале. Первичная ее апробация показала достаточную для поставленных задач эффективность. Выполнение всех видов работ согласно предлагаемой методике позволит получить более подробную и объективную картину развития местного ювелирного производства. The article describes the new method of quantitative and qualitative processing of data from Medieval metals, derived through the method of X-ray fluorescence analysis, in order to identify the production location through the comparison of raw metal compositions and finished objects. The idea of the necessity of such a comparison is based on the earlier made conclusion that Pskovian workshops prioritised the use of finished raw metal without attempting to influence its technological properties through alloying. The application of this method makes sense only in the presence within the studied sample of a significant quantity of objects with a vast chronological span and represented by a full range of categories: from raw metal, blanks and semi-finished products, to finished objects. An important pre-condition is the origin of the metals from complexes, including production complexes. The presented method includes several stages, part of which has already been completed on the Pskov material. Its first testing has shown a sufficient effectiveness for the posed tasks. The implementation of all steps of the proposed method will provide a more detailed and objective picture of the development of local jewelry production.

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