Simultaneous determination of oxygen and nitrogen in metals by carrier-gas fusion extraction

Dallmann, W. E.; Fassel, Velmer A.

doi:10.1021/ac60249a013

Cited by 30 publications

(10 citation statements)

References 46 publications

(33 reference statements)

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“…More complete recovery of both oxygen and nitrogen from a variety of metals, and in particular, more complete recovery of oxygen from metals containing manganese, by the addition of tin to the reaction mediun, has been reported by a number of investigators using vacuum and inert gas fusion techniques (11,12). Jones found that the addition of small quantities of tin or silver to certain steel samples caused more complete recovery of the oxygen content by the dc arc-extraction technique (4).…”

Section: Factors Influencing Extraction and Measurement Of Gasesmentioning

confidence: 95%

“…The chamber is separated from the vacuum manifold by valve [11] (Temescal Metallurgical Corp., toggle actuated, angle pattern, 2.54 cm port) with the valve seat located close to the side of the chamber. The extraction atmosphere inlet valve [12] and the shut-off valve [13] (both Whitey Research Tool Co., toggle actuated, angle pattern) to the chromatograph sampling system are welded to the chamber.…”

mentioning

confidence: 99%

“…The close positioning of the latter valve [13] minimizes the inclusion of dead volume gases in the chromatograph sample. The inlet valve [12] is protected from fouling by a wire screen and a glass wool filter. The chamber is water cooled through copper cooling coils [14],…”

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confidence: 99%

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Studies on the D.C. carbon arc, gas-chromatographic technique for the determination of gases in metal

Winge¹,

Fassel²

1969

Anal. Chem.

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Section: Factors Influencing Extraction and Measurement Of Gasesmentioning

confidence: 95%

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confidence: 99%

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Studies on the D.C. carbon arc, gas-chromatographic technique for the determination of gases in metal

Winge¹,

Fassel²

1969

Anal. Chem.

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“…The N content in steel can be determined by classical chemical dissolution procedures 14 with acceptable accuracy, but is limited in some cases. The classical vacuum fusion 15–16 and the carrier‐gas fusion 17–20 techniques are paid extensive attention to, of which the latter develops fast and is widely used in practice with quick determination, simple operation and high accuracy. The sample is placed in a graphite crucible and heated to certain temperature instantly in the heating furnace.…”

Section: Introductionmentioning

confidence: 99%

Effect of Sampling Methods on N Detection in High Nitrogen Steel

Li¹,

Shaojun²

2011

steel research int.

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The effect of sampling methods on the detection of N content in the high nitrogen steel (HNS) was studied by variance analysis method. In the experiments, two kinds of samples (rod sample and chip sample) were chosen. It was showed that when the N content was in the range of 0.06%∼0.4%, the results obtained by two methods were almost the same, indicating that both were suitable to identify the N in the steel. However, when the N content was higher than 0.4%, the result obtained using chips as sample was lower than that using rod. The N2 bubble in the rod sample might cause error since it didn't comprise the N content. Hence, the N content could be reflected more accurately by the chip samples. Based on the difference of N content detected by two methods, the shrinkage rate was analyzed theoretically and found to be inversely proportional to the pressure of N2 bubbles in steel.

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“…in the analysis of steels (1,2), ferroalloys (3), and metals (4)(5)(6), and to a lesser degree in the analysis of metal nitrides (7), rocks (8), lunar samples (9), and iron and stoney meteorites (10,11).…”

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confidence: 99%