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Determination of microamounts of carbon in various metals and alloys by the combustion-nonaqueous titrimetric method

Journal Article:

Abstract

Microamounts of carbon (7 -- 600 ppm) in ferrous and non-ferrous metals and alloys were determined by the combustion-nonaqueous titrimetric method. The carbon dioxide liberated by the combustion of a sample was absorbed with dimethylformamide (DMF) containing monoethanolamine and then the absorbent was titrated with the standard benzene-methanol solution of tetra-n-butylammonium hydroxide (0.007-0.002 M). The end point of the titration was located either visibly by using thymolphthalein as an indicator or potentiometrically by using a couple of platinum and calomel (containing DMF) electrodes. Pure benzoic acid was used as the standard substance for the standardization. Many improvements were given on both the combustion apparatus and the procedure. Microamounts of carbon in various samples were determined by the proposed method. They are : plain carbon and high purity ferritic stainless steels (0.05 -- 0.002% C), Inconel X-750 (0.027% C), copper alloys (20 -- 30 ppm C), tantalum powder (40 ppm C) and high purity metallic uranium (7 ppm C). All results were quite satisfactory and indicate that the proposed method was adaptable for the determination of carbon less than 100 ppm in various samples without use of any standard samples or calibration curves.
Authors:
Yoshimori, T; Koike, A; [1]  Katoh, N
  1. Science Univ. of Tokyo (Japan). Faculty of Engineering
Publication Date:
Dec 01, 1977
Product Type:
Journal Article
Reference Number:
AIX-09-397474; EDB-78-128858
Resource Relation:
Journal Name: J. Jpn. Inst. Met.; (Japan); Journal Volume: 41:12
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CARBON; TITRATION; COPPER ALLOYS; CHEMICAL ANALYSIS; INCONEL X750; IRON ALLOYS; STAINLESS STEELS; TANTALUM; URANIUM; ALLOYS; AMIDES; CARBON DIOXIDE; CHEMISORPTION; COMBUSTION; METALS; NONAQUEOUS SOLVENTS; QUANTITATIVE CHEMICAL ANALYSIS; TRACE AMOUNTS; ACTINIDES; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; CHEMICAL REACTIONS; CHROMIUM ALLOYS; CORROSION RESISTANT ALLOYS; ELEMENTS; INCONEL ALLOYS; IRON BASE ALLOYS; NICKEL ALLOYS; NICKEL BASE ALLOYS; NONMETALS; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; OXIDATION; OXIDES; OXYGEN COMPOUNDS; REFRACTORY METALS; SEPARATION PROCESSES; SOLVENTS; SORPTION; STEELS; THERMOCHEMICAL PROCESSES; TITANIUM ALLOYS; TRANSITION ELEMENTS; 400102* - Chemical & Spectral Procedures
OSTI ID:
6667732
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: CODEN: NIKGA
Submitting Site:
INIS
Size:
Pages: 1236-1240
Announcement Date:

Journal Article:

Citation Formats

Yoshimori, T, Koike, A, and Katoh, N. Determination of microamounts of carbon in various metals and alloys by the combustion-nonaqueous titrimetric method. Japan: N. p., 1977. Web.
Yoshimori, T, Koike, A, & Katoh, N. Determination of microamounts of carbon in various metals and alloys by the combustion-nonaqueous titrimetric method. Japan.
Yoshimori, T, Koike, A, and Katoh, N. 1977. "Determination of microamounts of carbon in various metals and alloys by the combustion-nonaqueous titrimetric method." Japan.
@misc{etde_6667732,
title = {Determination of microamounts of carbon in various metals and alloys by the combustion-nonaqueous titrimetric method}
author = {Yoshimori, T, Koike, A, and Katoh, N}
abstractNote = {Microamounts of carbon (7 -- 600 ppm) in ferrous and non-ferrous metals and alloys were determined by the combustion-nonaqueous titrimetric method. The carbon dioxide liberated by the combustion of a sample was absorbed with dimethylformamide (DMF) containing monoethanolamine and then the absorbent was titrated with the standard benzene-methanol solution of tetra-n-butylammonium hydroxide (0.007-0.002 M). The end point of the titration was located either visibly by using thymolphthalein as an indicator or potentiometrically by using a couple of platinum and calomel (containing DMF) electrodes. Pure benzoic acid was used as the standard substance for the standardization. Many improvements were given on both the combustion apparatus and the procedure. Microamounts of carbon in various samples were determined by the proposed method. They are : plain carbon and high purity ferritic stainless steels (0.05 -- 0.002% C), Inconel X-750 (0.027% C), copper alloys (20 -- 30 ppm C), tantalum powder (40 ppm C) and high purity metallic uranium (7 ppm C). All results were quite satisfactory and indicate that the proposed method was adaptable for the determination of carbon less than 100 ppm in various samples without use of any standard samples or calibration curves.}
journal = {J. Jpn. Inst. Met.; (Japan)}
volume = {41:12}
journal type = {AC}
place = {Japan}
year = {1977}
month = {Dec}
}