Determination of iodine in organic iodine compounds by non-equilibrium isotope exchange in a heterogeneous exchange system

1985 ◽  
Vol 89 (2) ◽  
pp. 365-371 ◽  
Author(s):  
Y. Takahashi ◽  
N. Ikeda
Keyword(s):  
Isotope Exchange ◽  
Exchange System ◽  
Organic Iodine ◽  
Iodine Compounds ◽  
Heterogeneous Exchange ◽  
Non Equilibrium

scholarly journals Erratum

1968 ◽  
Vol 14 (6) ◽  
pp. 582-582
Keyword(s):  
Distilled Water ◽  
Serum Thyroxine ◽  
Organic Iodine ◽  
Final Volume ◽  
Iodine Compounds

Abstract The article "Determination of Organic Iodine Compounds in Serum: IV. A New Nonincineration Technic for Serum Thyroxine" by Vincent J. Pileggi and Gerald Kessler—Clin. Chem. 14, 339 (1968)—contains an error. On page 340, under Reagents, the preparation of the bromate-bromide reagent should read: Bromate-bromide reagent (0.1 M KBrO3, 0.6 M KBr) KBrO3, 1.67 gm., and KBr, 7.14 gui., are dissolved in distilled water, and the solution made to a final volume of 100 ml.

Determination of Organic Iodine Compounds in Serum

1962 ◽  
Vol 8 (6) ◽  
pp. 647-653 ◽  
Author(s):  
Vincent J Pileggi ◽  
Richard J Henry ◽  
Milton Segalove ◽  
George C Hamill
Keyword(s):  
Serum Protein ◽  
Paper Chromatography ◽  
Solvent System ◽  
Organic Iodine ◽  
Iodine Compounds ◽  
System 2

Abstract RI — values of organic iodine compounds which interfere with the determination of serum protein-bound iodine (PBI) and butanol-extractable iodine (BEI) levels were obtained for the solvent system 2-butanol-4% NH4OH (3:1) utilizing descending paper chromatography. The feasibility of employing this system for identification of exogenous organic iodine in patients' sera was investigated. In general, the demonstration of these compounds or their metabolites was achieved only in sera obtained shortly after administration. This was due mainly to sensitivity limitations in the detection of the compounds on paper. Some data on the duration of interference with the PBI and BEI were also obtained for the radiopaque dyes Telepaque, Hypaque, Salipix, and Orabilex.

Determination of Organic Iodine Compounds in Serum

1968 ◽  
Vol 14 (4) ◽  
pp. 339-347 ◽  
Author(s):  
Vincent J Pileggi ◽  
Gerald Kessler
Keyword(s):  
Acetic Acid ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Direct Determination ◽  
Wet Digestion ◽  
Organic Iodine ◽  
Iodine Compounds ◽  
Dry Ashing ◽  
Dowex 1

Abstract Unidentified substances in acetic acid column eluates, obtained in the determination of serum thyroxine by column chromatography with the anion-exchange resin Dowex-1, prevented the direct determination of thyroxine by interference with the iodidecatalyzed ceric-arsenite reaction. Pretreatment of the eluates with Br2 or Cl2 eliminated the interference and permitted the direct assay of thyroxine by the ceric-arsenite system without incineration or wet digestion. Pretreatment with Br2 or Cl2 also significantly enhanced the catalytic activity of thyroxine, rendering its iodine nearly equivalent to inorganic iodide in the ceric-arsenite system. This nonincineration thyroxine assay is significantly more specific than methods that employ wet or dry ashing, because many organic iodine compounds used in diagnosis and therapy are not measured. A comparison of the nonincineration technic with the alkaline dry-ash method on 110 random serums revealed a mean difference of 0.13 µg./100 ml. (X = 4.5 µg./ 100 ml.), with the nonincineration technic yielding the higher result. This difference was found to be statistically significant (p< 0.001).

Determination of trace amounts of cobalt by homogeneous isotope exchange in an organic phase

1980 ◽  
Vol 45 (12) ◽  
pp. 3332-3337
Author(s):  
Václav Jiránek
Keyword(s):  
Organic Phase ◽  
Isotope Exchange ◽  
Radiochemical Method

A new radiochemical method for determining trace amounts of cobalt has been worked out. It is based on a homogeneous isotope exchange between cobalt(III) diethyldithiocarbamate and cobalt(III) caprate in an organic phase. The method, tested in the range 0.005-8 μg Co, has proved to be selective.

scholarly journals Electron-Phonon Coupling Parameter of Ferromagnetic Metal Fe and Co

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2755
Author(s):  
Kyuhwe Kang ◽  
Gyung-Min Choi
Keyword(s):  
Coupling Parameter ◽  
Critical Role ◽  
Circuit Modeling ◽  
Metallic Materials ◽  
Phonon Coupling ◽  
Electron Phonon Coupling ◽  
Complicated Process ◽  
G Value ◽  
Non Equilibrium

The electron-phonon coupling (g) parameter plays a critical role in the ultrafast transport of heat, charge, and spin in metallic materials. However, the exact determination of the g parameter is challenging because of the complicated process during the non-equilibrium state. In this study, we investigate the g parameters of ferromagnetic 3d transition metal (FM) layers, Fe and Co, using time-domain thermoreflectance. We measure a transient increase in temperature of Au in an FM/Au bilayer; the Au layer efficiently detects the strong heat flow during the non-equilibrium between electrons and phonons in FM. The g parameter of the FM is determined by analyzing the temperature dynamics using thermal circuit modeling. The determined g values are 8.8–9.4 × 1017 W m−3 K−1 for Fe and 9.6–12.2 × 1017 W m−3 K−1 for Co. Our results demonstrate that all 3d transition FMs have a similar g value, in the order of 1018 W m−3 K−1.

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