Zur Genauigkeit sequentieller AAS-Elementbestimmungen in elektro-chemisch isolierten Gefügebestandteilen differenziert behandelter Stähle

Stahlberg, R.; Steglich, F.; Zieger, Michael

doi:10.1007/bf00468648

Cited by 9 publications

(7 citation statements)

References 7 publications

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“…HC1, 5 ml HNO3, 3 ml HF). Considering that numerous interelement interferences occur in carbide analysis [5], three synthetic standards were prepared for each isolate to be analysed. Figure 4 presents the concentration ranges and spectral lines for determination of Cr, Mo, Ti, Nb, Zr, W, V, and Fe, together with the suitable dilution factors.…”

Section: Apparatusmentioning

confidence: 99%

Preparation of carbide isolates of new high-speed steel for analysis by atomic absorption spectrometry

1998

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Abstract. The paper presents results of the investigation of a new high-speed steel's (HSS) carbide isolates, using atomic absorption spectroscopy (AAS). Because of the presence of metallic residues, two stage preparation of isolates was applied: electrolytic winning of the carbide isolates, followed by additional treatment with phosphoric acid. The chemical compositions so obtained were of enhanced accuracy and served as input data for computing the matrix's chemical composition. This indirect approach reduced the errors connected with the phases mutual contribution, such as occur in the case of HSSs and steels of similar multi-phase microstructure when bulk specimens are investigated with energy dispersive XRE The extent of the carbides' dissolution in the matrix and hence the matrix's saturation during hardening, as well as the character of secondary precipitation while tempering, were assessed. These findings are of importance in respect of both phenomena during heat treatment and the investigated steel's properties.

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Section: Apparatusmentioning

confidence: 99%

Preparation of carbide isolates of new high-speed steel for analysis by atomic absorption spectrometry

1998

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“…An electrochemical separation was used to provide sufficient sample for the deteirmination of chromium (up to the 10% level) in differently treated steels by flame atomic absorption spectrometry (442). With regard to the direct determination of chromium in solution from a dissolved steel sample, the effect of iodine in eliminating interferences in the AA flame has been studied (193,194).…”

Section: Carbonmentioning

confidence: 99%

“…In one case, electrochemical isolation was employed to produce enough sample in solution for the determination of Cu in differently treated steels (442). KHS04 and K2S607 were effective as fluxes for the rapid decomposition of steel prior to an AA analysis with an air-CzH2 flame (478).…”

Section: Coppermentioning

confidence: 99%

“…Prior fluxing of steel chips with KHS04 and K2S207 was used in another study of sample preparation for an oxidizing flame AA determination of manganese in steel (478), while electrochemical isolates from steel were also used to provide a sample for analysis by flame AA (442). A detailed description of component interactions during the flame AA analysis of high-alloy steels for their Mn content and recom-ANALYTICAL CHEMISTRY, VOL.…”

Section: Manganesementioning

confidence: 99%

“…Several different sample preparation techniques as well as direct analysis were used for the atomic absorption analysis of various steels. In one case, electrochemical isolation was employed to produce enough sample in solution for the determination of Cu in differently treated steels (442). KHSO4 and K2S607 were effective as fluxes for the rapid decomposition of steel prior to an AA analysis with an air-C2H2 flame (478).…”

Section: Chromiummentioning

confidence: 99%

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Water analysis

Fishman¹,

Erdmann²,

Garbarino³

1983

Anal. Chem.

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This review is produced from a search of the literature as performed with the DIALOG capabilities of Chemical Abstracts Service. The material covered in this particular review is a continuation of past reviews by the same authors and covers the period from September 1980 to October 1982 It is obvious that the level of activity in the publication of research results by analytical chemists and spectrographers in the steel industry is significantly reduced and directly reflects the malais that affects our industry. Without being overly critical, we will have approximately 300 less literature citations in this review as compared to the last one (448). ALUMINUMTotal trace aluminum was determined spectro hotometpriate dissolution steps as an Eriochrome Cyanine R complex (98), by using Chromazol KS as a color-forming agent (269), as a colored complex with salicylidene-o-aminophenol-4sulfonic acid (523), and with l-pheny1-2,3-dimethylpyrazolone-5-azopyrogallol (13).Low levels of A1 have been determined in high-and lowalloy steels and ferrovanadium by atomic absorption after separation from the matrix by electrolysis (94). The determination of acid soluble aluminum by AA continues to be a very popular method in the steel industry by virtue of its rapidity (51,76,511). Low concentrations were also determined in silicon steels by using electrothermal atomization (245). Direct injection of a dissolved steel sample into an AI-H flame has been reported (282).AA has not supplanted emission spectrochemical methods for this determination as they continue to be used for both soluble and insoluble aluminum determinations in steel (135,304). One method involves the premelting of a selected zone on a sample surface in an inert atmosphere so as to concentrate the insoluble aluminum inclusions in the surface of the remelted zone upon which the surface is mechanically removed and subsequently analyzed spectrally for the soluble portion (76). A design for an instrument has been claimed that eliminates anomalous emission spectrometric signals from aluminum inclusions, thus permitting the determination of acid-soluble A1 with high precision (452). rically in some unalloyed and low-alloyed steels a P ter appro-Various other procedures have been applied in a general way for the analysis of steel and related materials and include the use of lasers for localized sampling prior to spectral excitation (208,311), Grimm glow-discharge source excitation (466), ICP emission spectrometry (15,101), an acid dissolution, ignition, and NaF fluxing prior to dc arc excitation for stainless-steel analysis (299), and the use of dc plasma techniques for iron ores, sinters, and dust analysis (369).The accuracy of XRF spectrometry for determining A1 in low-alloy and stainless steels (at <0.1%) has reportedly been improved by adding granular FeZr to the molten metal during sampling (184). Conversely, a rapid and high percision XRF method for the determination of the A1203 content of steels has been described (317). Procedures for the routine XRF analysis of iron...

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Methodische Untersuchungen zur metallkundlichen Analyse mittels elektrochemischer Phasenisolation

Kunath

Stahlberg

1983

Archiv für das Eisenhüttenwesen

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Zur Genauigkeit sequentieller AAS-Elementbestimmungen in elektro-chemisch isolierten Gefügebestandteilen differenziert behandelter Stähle

Cited by 9 publications

References 7 publications

Preparation of carbide isolates of new high-speed steel for analysis by atomic absorption spectrometry

Preparation of carbide isolates of new high-speed steel for analysis by atomic absorption spectrometry

Water analysis

Methodische Untersuchungen zur metallkundlichen Analyse mittels elektrochemischer Phasenisolation

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