Simultaneous Determination of Oxygen and Nitrogen in Refractory Metals by the Direct Current Carbon-Arc, Gas Chromatographic Technique.

Winge, R.K.; Fassel, Velmer A.

doi:10.1021/ac60220a014

Cited by 23 publications

(3 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Direct current carbon arc excitation was used prior to the gas chromatographic determination of nitrogen (569). Several modifications were made to improve carrier gas fusion method (76,147,215,270,271,297,390) and the isotopic dilution technique (151,152,171,419).…”

Section: Gases In Metalsmentioning

confidence: 99%

“…Most carrier gas fusion methods wrere based on the gas chromatographic measurement of oxygen, but coulometric titration (1,190) and conductometric (464) methods were also used for steels, and gravimetric methods were used for the macro determination of oxygen in metal oxides (230,236) and iron pow'ders (128). Besides conventional fusion extractions, arc-fusion techniques (267,268,569) w'ere successfully applied to the extraction of oxygen from iron and steel samples.…”

Section: Gases In Metalsmentioning

confidence: 99%

See 1 more Smart Citation

Ferrous metallurgy

Pásztor¹,

Hines²

1967

Anal. Chem.

View full text Add to dashboard Cite

HIS REPORT reviews the advances in T ferrous metallurgical analysis from October 1964 to December 1966. As in the past (58), it draws extensively from abstracts and is not intended to be a complete compilation of the papers published in the field.The increased use of fast steelmaking, processes, vacuum deoxidation, and continuous casting techniques has greatly influenced the need for rapid and automated ferrous nietallurgical analytical methods (14). In addition, stringent requirements on steel composition by steel users have forced the analytical chemist to search not only for rapid, but also for more accurate analytical methods. The majority of methods found in the literature still involve modifications of well established techniques and procedures rather than the introduction of new approaches.Greatest progress was made in the application of atomic absorption spectrometry (502) and neutron activation techniques (335, 557) to the routine analysis of iron, iron ores, slags, and steels, and in the automation and computerization (166) of chemical and instrumental methods.Present steel sampling and sample preparation techniques are generally too sloiv and inadequate for control of the new steelmaking processes and thus present the most apparent restriction to the rapid analytical methods. The realization of this problem was indicated by the relatively large number of papers published on sampling (95,428, 429,480, 605, 51 1 , 520) and on attempts for the direct analysis of molten steel (32,Emission and x-ray spectrometric, atomic absorption spectrophotometric, and other instrumental techniques with various degrees of automation became the most important means for better process and quality control. Chemical routine methods, even the automated ones, decreased in importance except in the field of nonmetallic inclusion isolation where there is a new renaissance in the use of chemical approaches (10,293,381).Schemes were given for the analyses of cast iron (484) and slags (288,417).Differential spectrophotometry (522) , electrochemical methods (380), atomic absorption spectrophotometry (502), gases in metals analysis (42, 214,242,265,364), and standard deviation of methods (132) in connection with steel analysis were reviewed. 158-161, 344, 366, 567). ALUMINUM Volumetric aluminum procedures involved variations of EDTA (156, 257, 331), bromatometric (440), and potentiometric (134) titrations. Xodifications of the 8-hydroxyquinoline (81 , I l Z ) , aluminon (120, 448, 487), eriochrome cyanin R (220, 22$), solochrome cyanine (411)) chrome azurol S (69, 77, 4 Z l ) , and alizarin red S calcium (106) spectrophotometric and of the 8-hydroxyquinoline spectrofluorometric (20300) methods were described. Most pro-cedures involved preliminary separations by mercury cathode (109, 200, +$do), solvent extraction (69, 212, 120, 200,309,411,448), precipitation (goo, 25'7), or ion exchange (509). 135,Aluminum was polarographically determined in stainless steel (4437, ferrotitanium (199)) and ferro-niobium (198). Neutron activation an...

show abstract

Section: Gases In Metalsmentioning

confidence: 99%

Section: Gases In Metalsmentioning

confidence: 99%

Ferrous metallurgy

Pásztor¹,

Hines²

1967

Anal. Chem.

View full text Add to dashboard Cite

show abstract

“…D.C. Carbon-Arc Extraction. Since neither the emission spectrometric (11) nor the gas-chromatographic (30) modifications of the technique, as presently practiced, are based on absolute measurements of oxygen concentrations, it has been necessary to resort to standard samples for calibration purposes. If a series of furnace-fusion analyzed standard samples are used as calibrating standards for a particular metal, any systematic analytical error in the fusion procedures would be reflected in the resultant calibration as well.…”

mentioning

confidence: 99%