Determination Of Manganese In Iron Research Articles

Photometry Under the Condition of "Precision Rule"

Taking the determination of manganese in iron and steel as an example, it is proved that following the "precision rule", that is, “to maintain infection consistency of each factor for the each sample in the same measurement series”, the "content determination series" of photometry will present its "content absorption law": In the absorbance domain ,the coordinate points of all content and corresponding absorbance must be in the same straight line. Whether it's trace or high content, the connecting line of the coordinate points of the upper and lower limits of the two standard samples can be used as the "measuring line" of the sample content. The "two standard photometry" is established, which changes the traditional concept and presents the simple, high-speed and high efficiency nature of photometry. It is also the embodiment of normal distribution theory in photometry, so the measured values of samples are normal distribution. Systematic error and abnormal error (statistical outlier) are easy to find, which ensures the reliability of the measurement results. The uncertainty evaluation of the measurement results is simplified, the measurement model of the uncertainty is established, which is concise and practical, and realizes the unity with the allowable error; The new understanding also provides new ideas for the development of photometer: The measuring parts of the photometer shall conform to the "precision rule"; The filter beam has higher sensitivity and better reproducibility.

Erratum to: Determination of manganese in iron and iron concentrates by parametric methods of neutron activation analysis, using 59Fe as internal monitor

Erratum to: Determination of manganese in iron and iron concentrates by parametric methods of neutron activation analysis, using 59Fe as internal monitor

Determination of manganese in iron and iron concentrates by parametric methods of neutron activation analysis, using 59Fe as internal monitor

A method for manganese determination in iron concentrates by reactor activation analysis has been developed, on the basis of discounting the contribution of the 56Fe(n,p)56Mn to the total 56Mn activity through the 56Mn/54Mn activity ratio, employing the data on the nuclear constants involved. The possibility of using 59Fe as internal monitor, for the calculation of manganese concentration, is evaluated for different values of both the \(\phi_{\text{epi}} /\phi_{\text{th}}\) ratios and the α parameter.

フローインジェクション分析法による鉄鋼中マンガンの簡易・迅速かつ高精度定量

フローインジェクション分析法による鉄鋼中マンガンの簡易・迅速かつ高精度定量

Determination of manganese in iron and steels by u.h.f. plasma-torch emission spectrometry

The determination of manganese in iron and steels by u.h.f. plasma torch spectrometry is described. The intensity of the Mn II 257.16-nm ion line decreased with increasing concentration of iron, whereas the intensity of the Mn I 403.07-nm atom line increased; only the Mn I 279.48-nm atom line showed constant intensity as the concentration of iron increased. This behavior can be explained in terms of plasma temperature. The effects of acids were examined; the influence of small amounts of diverse elements was depressed by a large amount of iron. A simple and rapid method for the determination of manganese in iron and steels was established, the relative standard deviation being 2.6 % for 0.10 % Mn.

The determination of manganese in iron and steel by atomic absorption spectrophotometry

A procedure is described for the determination of 0.001–2% of manganese in low and high alloy irons and steels by atomic absorption spertrophotometry. The sample is dissolved in phosphoric-sulphuric acid and atomised in an atomic absorption spectrophotometer. The method is rapid, free from interferences, preliminary separations are not required and results obtained on standard samples agree closely with stated certificate values.

過塩素酸分解による鉄鋼中マンガンの吸光光度定量法

過塩素酸分解による鉄鋼中マンガンの吸光光度定量法

Rapid Determination of Manganese in Iron and Steel by Oxidation with Ammonium Persulfate and Titration with Sodium Thiosulfate

鉄鋼中のマンガン迅速定量法には,硝酸銀を触媒として過硫酸アンモニウムで酸化し,亜ヒ酸ナトリウム標準溶液で滴定する方法が多く採用されている.この方法についてはSmithの発表以来多数の研究があるが,滴定の際マンガンの還元はMn3.3+附近でとまりMn2.0+迄は進まぬ故,試料溶液が淡黄色を呈し終点の判定に熟練を要し,また試料中のマンガン含有量によって標準溶液1ccのマンガン相当量が,異るともいわれている.これらの点を改良する目的で滴定の際,触媒としてオスミウム塩等を添加する方法,或は標準溶液として亜硝酸ナトリウム,亜ヒ酸ナトリウムと亜硝酸ナトリウムとの混合溶液,硫酸バナジル,シユウ酸またはシュウ酸ナトリウム等を使用する提案があるが,概しで一長一短のようである.著者等は日本学術振興会所定の「鉄および鍋中のマンガン迅速分析法,第1法」,あるいは日本工業規格(JIS)の「銅および銑鉄のマンガン分析方法(3)」の指針において,亜ヒ酸ナトリウム滴定法の代りにチオ硫酸ナトリウム滴定法を試みた処,亜ヒ酸ナトリウム法に劣らぬように思われたので,その結果を報告する.

Determination of Manganese in Iron, Steel and Ferromanganese (1st Report). Determination of Manganese in Iron and Steel

The suitable concentration of acids and other conditions in ferrous-permanganate method after oxidation with persulfate for the determination of Mn in iron and steel were studied and the following results were obtained: (1) Acid concentration: using 2 g of (NH4)2S2O8 in total volume of 200 mL, Mn was determined in the concentration range of 1.2∼2.4 N H2SO4, 0.53∼1.20 N HNO3 and 0.6∼1.2 N mixed acid of H2SO4 and HNO3(3:1) but Mn could not be determined in acidic solution with HClO4. (2) Boiling time: the time for boiling of the solution for oxidation of Mn by (NH4)2S2O8 using AgNO3 was 5 min., causing the decomposition of permanganic acid. (3) Influence of H3PO4: when 1 g of Fe and 10 mg of Mn were present, the existence of 4 mL of H3PO4 (Sp. Gr 1.7) was preferable. (4) The suitable procedure for the determination of Mn in iron and steel was established and the analysis was carried out with several sample and good results were obtained.

Determination of Manganese in Iron, Steel and Ferromanganese (2nd Report). Determination of Manganese in Ferromanganese

Determination of Manganese in Iron, Steel and Ferromanganese (2nd Report). Determination of Manganese in Ferromanganese

誘發酸化法によるMnの定量について

On the determination of manganese in iron and steels, the method based on the induced oxidizing reaction using K2Cr2O7-NaAsO2 investigated by Lang-Kurtz, were studied in order to extend its applicability to the field of actual metallurgical analysis. Clarification of influences by various kinds of acid radicals in the sample solution and of a safty range of their concentration in which the reaction goes to completion is desirable. In this paper, the results on the range of concentration of acid radicals introduced, adaptable for the complete: oxidation of MnII in the state of MnIII, and about suitable quantitative relation between K2Cr2O7 and NaAsO2 in which the induced oxidation proceeds to completion, are given. The analytical procedure using HClO4 was then proposed, especially for the sample containing chromium. The satisfactory results were obtained.

THE VOLUMETRIC DETERMINATION OF MANGANESE IN IRON AND STEEL.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHE VOLUMETRIC DETERMINATION OF MANGANESE IN IRON AND STEEL.Harry E. WaltersCite this: J. Am. Chem. Soc. 1903, 25, 4, 392–394Publication Date (Print):April 1, 1903Publication History Published online1 May 2002Published inissue 1 April 1903https://doi.org/10.1021/ja02006a007RIGHTS & PERMISSIONSArticle Views50Altmetric-Citations2LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (161 KB) Get e-Alerts Get e-Alerts

Determination of Manganese in Iron

Determination of Manganese in Iron