Results 271 to 280 of about 665,234 (307)
Some of the next articles are maybe not open access.

Vibrational Analysis of 1,3,3-Trinitroazetidine Using Matrix Isolation Infrared Spectroscopy and Quantum Chemical Calculations

The Journal of Physical Chemistry A, 1997
Author Institution: Chemistry Division, U.S.Naval Research Laboratory; DEPARTMENT OF CHEMISTRY, UNIVERSITY OF NEW ...
Craig A. Thompson   +4 more
openaire   +1 more source

Influence of Matrix Effects on Quantitative Chemical Analysis by ESCA

1977
A quantitative study of gold-silver alloys has revealed a small but significant matrix effect due to changes in the mean free path of the photoelectrons. This was shown by comparsion of the sum of normalized intensities of the gold 4f and the silver 3d lines for 6 Au-Ag alloys with the line intensities of the pure metals.
Freund, H. ; https://orcid.org/0000-0001-5188-852X   +2 more
openaire   +1 more source

Chemical analysis and distribution investigation of trace elements in indium matrix by spark source mass spectrometry

Fresenius' Zeitschrift für analytische Chemie, 1987
High-purity indium was analysed by spark source mass spectrometry, using electrical and photoplate detection. For the calibration of the differences in elemental sensitivity, a standard sample was prepared in which 10 impurities were determined by graphite furnace atomic absorption spectrometry. In this way accuracies of less than 40% were obtained for
X. D. Liu, P. Van Espen, F. Adams
openaire   +1 more source

Direct Analysis of Volatile Methylsiloxanes in Gaseous Matrixes Using Atmospheric Pressure Chemical Ionization-Tandem Mass Spectrometry

Analytical Chemistry, 2009
Atmospheric pressure chemical ionization-tandem mass spectrometry (APCI-MS/MS) was applied for the first time to the direct analysis of octamethylcyclotetrasiloxane (D4) and decamethylcyclopentasiloxane (D5) in gaseous matrixes without extraction or prior chromatographic separation.
Koffi, Badjagbo   +4 more
openaire   +2 more sources

A holistic approach combining factor analysis, positive matrix factorization, and chemical mass balance applied to receptor modeling

Environmental Monitoring and Assessment, 2013
Rapid urbanization and population growth resulted in severe deterioration of air quality in most of the major cities in India. Therefore, it is essential to ascertain the contribution of various sources of air pollution to enable us to determine effective control policies.
N, Selvaraju, S, Pushpavanam, N, Anu
openaire   +2 more sources

MULTIBLOCK COPOLYMERS AS A MATRIX FOR ANALYTICAL ORGANIC REAGENTS USED IN CHEMICAL ANALYSIS

Herald Of Technological University, 2022
I. I. Zaripov   +3 more
openaire   +1 more source

Matrix and impurity element distributions in CdHgTe (CMT) and (Cd,Zn)(Te,Se) compounds by chemical analysis

Journal of Crystal Growth, 1996
Abstract This review describes several of the main techniques used to determine matrix element distributions and those which can provide a survey of impurity levels and assess deliberate doping concentrations in Cd x Hg 1 − x Te and CdTe-based substrate materials.
P. Capper   +6 more
openaire   +1 more source

H-matrix Based Stability Analysis of Chemical Process

2022 International Conference on Electrical, Computer, Communications and Mechatronics Engineering (ICECCME), 2022
openaire   +1 more source

Infrared chemical analysis using pseudo matrix isolation: A practical application for cryogenic spectroscopy

Spectrochimica Acta Part A: Molecular Spectroscopy, 1971
Abstract Matrix spectroscopy is useful as an analytical tool provided certain fundamental modifications are made in experimental technique. Apparatus requirements and sample preparation procedures are detailed. Only conventional spectrometric instrumentation is used.
openaire   +1 more source

Full-Matrix Analysis of the Error Propagation in Two-Dimensional Chemical-Exchange and Cross-Relaxation Spectroscopy

Journal of Magnetic Resonance, Series A, 1995
Abstract Propagation of errors in a multispin system, from the experimental peak volumes into magnetization-exchange (cross relaxation or chemical exchange) rates, was calculated analytically. An explicit expression was derived for the error propagator. The error for each magnetization-exchange rate constant has a minimum, with the position dependent
openaire   +1 more source

Home - About - Disclaimer - Privacy