Preparation of Synthetic Calibration Materials for Use in the Microanalysis of Oxide Minerals by Direct Fusion in High-Purity Graphite Electrodes: Preliminary Results for Quartz and Rutile

1999 ◽  
Vol 23 (2) ◽  
pp. 173-186 ◽  
Author(s):  
Magne Ødegård
Keyword(s):  
High Purity ◽  
Graphite Electrodes ◽  
Preliminary Results ◽  
Oxide Minerals ◽  
Calibration Materials ◽  
Direct Fusion

scholarly journals High Purity Metals as Primary Calibration Materials for Elemental Analysis-Their Importance and Their Certification

2002 ◽  
Vol 43 (2) ◽  
pp. 90-97 ◽  
Author(s):  
Ralf Matschat ◽  
Michael Czerwensky ◽  
Sandra Pattberg ◽  
Hans-Joachim Heinrich ◽  
Silke Tutschku
Keyword(s):  
Elemental Analysis ◽  
High Purity ◽  
Calibration Materials

scholarly journals Production of Silicon Metal From Iraqi Sand

2014 ◽  
Vol 11 (1) ◽  
pp. 81-84 ◽  
Author(s):  
Baghdad Science Journal
Keyword(s):  
Solar Cells ◽  
High Purity ◽  
Analysis Data ◽  
Electric Arc ◽  
Graphite Electrodes ◽  
Electric Arc Furnaces ◽  
Arc Furnaces ◽  
Work Production ◽  
Electronic Parts

In this work, production of silicon metal at high purity of 99% by using Iraqi–starting materials (Iraqi sand and plant coal)was reported, electric arc–furnaces assembly was manufactured inside, the graphite electrodes were made from graphite scrap, this system is operate to produce about 800 gm /6hr of silicon metal to meet the need for manufacturing silicon oils, resins, solar cells, and electronic parts. The procedure, equipments and analysis data were described as well.

MEASUREMENT OF THE CROSS SECTION RATIOS AND FORWARD-BACKWARD ASYMMETRIES OF FLAVOUR TAGGED EVENTS WITH THE DELPHI DETECTOR AT LEP 2

2001 ◽  
Vol 16 (supp01a) ◽  
pp. 333-335
Author(s):  
WOLFGANG LIEBIG
Keyword(s):  
Standard Model ◽  
Cross Section ◽  
High Purity ◽  
Secondary Vertex ◽  
Final States ◽  
Cross Section Ratio ◽  
Preliminary Results ◽  
Delphi Detector ◽  
The Standard Model ◽  
The Cross

In this paper preliminary results of the cross-section ratio [Formula: see text] and the forward-backward asymmetry [Formula: see text] are presented for [Formula: see text] final states produced in the reaction [Formula: see text]. They are measured with the DELPHI detector at LEP collision energies ranging from 183 up to a maximum of 209 GeV. Lifetime and secondary vertex information provided by DELPHI's 3-layer microvertex detector are the main ingredients of a tagging variable which is used to separate the quark flavours. High purity selections are made from which Rf and [Formula: see text] are measured. The compatibility of the results with the Standard Model expectations is evaluated.

Spectrographic Determination of Traces of Iron in Copper and Silver by Carrier Distillation

1967 ◽  
Vol 21 (3) ◽  
pp. 151-154 ◽  
Author(s):  
P. Tymchuk ◽  
J. A. H. Desaulniers ◽  
D. S. Russell ◽  
S. S. Berman
Keyword(s):  
High Purity ◽  
Coefficient Of Variation ◽  
Copper Chloride ◽  
Graphite Electrodes ◽  
Spectrographic Determination ◽  
Wide Range ◽  
Silver Matrix ◽  
Spectrographic Method ◽  
Purity Copper

A quantitative spectrographic method has been developed for the determination of traces of iron in high-purity copper and silver. The use of copper chloride as a spectrographic carrier improves the sensitivity and enables the method to be used over a very wide range of concentrations. Samples containing from 0.004 to more than 150 μg of iron (0.07–2500 ppm) can be determined by the identical procedure. A series of 15 replicate copper samples containing 6.4 ppm iron yielded a coefficient of variation of 5.2%. The intensity of the iron spectrum is apparently independent of the copper or silver matrix, which greatly simplifies the preparation of calibration curves. Methods for the preparation of iron-free copper chloride and for purifying graphite electrodes are also outlined.

Thermal CVD of Amorphous Germanium Films From 2, 5-Bis (Tert.-Butyl) -2, 5-Diaza-l-Germa-Cyclopentane Organometallic Precursor

1994 ◽  
Vol 336 ◽  
Author(s):  
F. Glatz ◽  
J. prokop ◽  
S. Vepřek ◽  
F.R. Klingan ◽  
W.A. Herrmann
Keyword(s):  
Detection Limit ◽  
Electronic Properties ◽  
Oxygen Content ◽  
High Purity ◽  
Amorphous Germanium ◽  
Preliminary Results ◽  
Tert Butyl ◽  
Thermal Cvd ◽  
Organometallic Precursor ◽  
Germanium Films

ABSTRACTA novel organometallic germylene precursor has been synthesized and used for the deposition of amorphous germanium by thermal OM CVD at temperatures below 300°C. The films are of high purity with an oxygen content below the present detection limit of about < 1018 cm−3. Preliminary results on the electronic properties are reported.

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