2 edition of Gas chromatographic determination of selenium in biological materials found in the catalog.
Gas chromatographic determination of selenium in biological materials
Nels David Pedersen
Written in English
|Statement||by Nels David Pedersen.|
|The Physical Object|
|Pagination||, 33 leaves, bound :|
|Number of Pages||33|
Results for Se in several biological standard reference materials obtained by INAA and selective RNAA procedures developed in our laboratory, are presented and discussed. The comparison of selenium levels in selected blood plasma samples determined by non-destructive NAA and HG-AAS is also by: 3. This paper reviews the following problems, sampling, decomposition procedures and most important analytical methods used for selenium determination, e.g., neutron activation analysis, atomic absorption spectrometry, gas-liquid chromatography, spectrophotometry, fluorimetry, and x-ray by:
Chromatography, technique for separating the components, or solutes, of a mixture on the basis of the relative amounts of each solute distributed between a moving fluid stream, called the mobile phase, and a contiguous stationary phase. The mobile phase may be either a liquid or a gas, while the. Overview. Chromatography is ideal for teaching the principles of protein and nucleic acid purification. Chromatography materials including instruments, columns, media, and other chromatography supplies are provided in convenient formats to perform the most common chromatographic techniques.
chromatography, the mobile phase is a gas that carries the analytes through the column and is therefore referred to as the carrier gas. The stationary phase for this experiment is a silicon phase. In this experiment, the carrier gas is inert helium. Just like with a HPLC instrument, a GC is composed of several Size: KB. Se-containing biomolecules. Selenium is an essential micronutrient in mammals, but is also recognized as toxic in excess. Selenium exerts its biological functions through selenoproteins, which contain the amino acid -five selenoproteins are encoded in the human genome.. Glutathione peroxidase. The glutathione peroxidase family of enzymes (abbreviated GSH-Px) catalyze.
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Gas-liquid chromatographic determination of selenium in biological materials using 4-bromo and 4-chloro-1,2-diaminobenzene as derivatizing agent, J. Assoc. Off Author: Raymond J. Shamberger. Gas-chromatographic conditions permit detection of selenium concentrations below 1 ppb.
Mean deviation and relative accuracy average and %, respectively. The method has been used in human population studies to assess selenium-mercury correlations and to examine the selenium content and form in specific protein fractions of fish by: Bycroft BM, Clegg DE.
Gas-liquid chromatographic determination of selenium in biological materials, using 4-bromo- and 4-chloro 1,2-diaminobenzene as derivatizing reagents. J Assoc Off Anal Chem. Jul; 61 (4)– Watkinson JH.
Fluorometric determination of selenium in biological material with 2, by: Isotope dilution gas chromatography/mass spectrometry for the determination of nickel in biological materials. Analytical Chemistry61 (10), DOI: /aca Rebecca L. Smith, David. Serxner, and Kenneth R.
by: Gas chromatographic determination of selenium in biological materials. Abstract. Graduation date: A method for the determination of selenium in biological\ud materials by gas-liquid chromatography has been developed and\ud successfully applied to kidney, heart, liver, and muscle tissue.
The\ud initial digestion of animal tissue was. Selenium is an important element in environmental and living organisms that is being essential in very narrow concentration range, while deficiency or toxicity occurs outside this range.
However, its toxicity depends not only on its dose but also on its chemical form. In environmental samples, selenium can exist in inorganic forms (as elemental selenium, metal selenides, selenite, or selenate Author: Aleksandra Sentkowska.
The third quarter of the book deals with detectors, which are the means of obtaining quantitative analyses by gas chromatography. It also contains a description of the union of gas chromatography with other techniques, and some indication of the use of the more sophisticated methods of handling gas-chromatographic data.
A gas chromatographic assay employing electron-capture detection for the determination of selenium in biological samples is reported. A calibration curve of 4-nitro-o-phenylenediamine derivative of selenium as a function of peak area was linear from 5– limit of detection for the electron-capture detector was approximately pg.
Recoveries of selenium added to various biological Cited by: Notes and comments on the determination of selenium in biological materials 63 technique for selenium determination in biological materials is described by Norheim & Haugen ().
Determination of selenium in biological materials by stable isotope dilution gas chromatography-mass spectrometry. Analytical Chemistry53 (14), DOI: /aca Robert J. Anderegg. Selective reduction of mass spectral data by isotope cluster by: PDF | OnAleksandra Sentkowska and others published Chromatographic Analysis of Selenium Species | Find, read and cite all the research you need on ResearchGate.
Determination of Trace Elements in Various Matrices: Part I DETERMINATION OF SELENIUM IN BIOLOGICAL MATERIALS AND WATER Prepared for publication by A.
CAMPBELL Department of Chemistry, University of Otago, Dunedin, New Zealand *Membership of the Commission during the preparation of this report (—83) was as follows:Cited by: selenium compounds in biological fluids and tissues, and Table lists the methods used for determining selenium in environmental samples.
BIOLOGICAL MATERIALS. Sampling of biological material for determination of total selenium concentrations does not usually pose a problem unless specific selenium compounds are to be identified (Bem ).File Size: KB.
DETERMINATION OF TOTAL SELENIUM AND SELENO-AMINO ACIDS IN YEAST AND AQUATIC ORGANISMS BY LIQUID CHROMATOGRAPHY AND INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY Lili WAN Dr. Michael Greenlief, Dissertation Supervisor ABSTRACT Selenium can be toxic to aquatic life at very low concentrations, even though it is.
GAS CHROMATOGRAPHIC ANALYSIS OF CYCLOPROPANE IN WHOLE BLOOD. Anesthesiology. Mar-Apr; – [Google Scholar] LUKAS DS, AYRES SM. Determination of blood oxygen content by gas chromatography. J Appl Physiol.
Mar; – [Google Scholar] RAMSEY LH. Analysis of gas in biological fluids by gas chromatography. : Wing Commander W. Fothergill. Becker, D.A., and LaFleur, P.D. DETERMINATION OF TRACE QUANTITIES OF URANIUM IN BIOLOGICAL MATERIALS BY NEUTRON ACTIVATION ANALYSIS USING A RAPID RADIOCHEMICAL SEPARATION.
Country unknown/Code not available: N. p., The gas-chromatographic determination of selenium in steel with 4-chloro-1,2-diaminobenzene M. Akiba, Y. Shimoishi and K.
Tôei, Analyst, DOI: /AN Selenium can be determined quantitatively in biological samples after digestion using nitric acid, orthophosphoric acid, and hydrogen peroxide and the formation of 5-nitropiazselenol. Samples are spiked with enriched 82Se and lsotoplc ratio of 80Se to 82Se is measured by combined gas chromatographymass spectrometry using dual ion monitoring.
Precise determination at the parts-per Cited by: Selenium(IV) reacts with 1,2-diaminonitrobenzene to form 5-nitropiazselenol, which is detected by means of a gas chromatograph equipped with an electron-capture detector.
Trace amounts of selenium(VI) and total selenium in milk, milk products and albumin were determined by this method with a practical detection. lines for selenium were,and A.!Ehe results given here show that, with the method described, from 2 to percent selenium can be determined quantitatively by usingAuthor: Claude L.
Waring, Helen Worthing, Katherine V. Hazel. Purchase Gas Chromatography - 1st Edition. Print Book & E-Book. ISBNFig. 3. Schematic of a simple system which adapts itself to a commercial gas chromatograph for the determination of trace impurities in gases. connected to the gas chromatograph (position 2).
In this way, the com-ponents desorbed from the condenser will pass with the carrier gas to the gas chromatograph and be analyzed. The applicability of our.A safe, practical, and accurate method for the determination of selenium (Se) in range of environmental samples was developed.
Small sample masses, 5–20 mg, were amended with 82 Se enriched isotope for the isotope dilution (ID), preceding a multi‐step wet digestion with nitric acid (HNO 3) and hydrogen peroxide (H 2 O 2).Samples were incubated in an autoclave for 3 h at 20 psi and ° by: 6.