EN 26352:1991 PDF

Name: EN 26352:1991 — Ferronickel - Determination of nickel content - Dimenthylglyoxime gravimetric method (ISO 6352:1985)
SKU: EN 26352:1991
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Ferronickel - Determination of nickel content - Dimenthylglyoxime gravimetric method (ISO 6352:1985)

Название (английский):

EN 26352:1991

Ferronickel - Determination of nickel content - Dimenthylglyoxime gravimetric method (ISO 6352:1985)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 10
Дата публикации:: 6 ноября 1991 г.
Издание:: CEN EN 26352 edition 1 version 1
ICS:: 77.100

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Описание (английский):

Applies to nickel contents in the range 15 to 60 % (m/m). Specifies principle, reagents, apparatus and samples, procedure, expression of results and test report. Annex A is provided for the determination of nickel in combined filtrates by atomic absorption spectrometry. Annex B gives a statistical report of interlaboratory tests.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN 26352:1991 (identical with ISO 6352:1985) specifies a standardized gravimetric method using dimethylglyoxime for the determination of nickel content in ferronickel. The procedure applies to nickel concentrations in the range 15–60 % (m/m) and defines principle, reagents, apparatus, sample preparation, analytical procedure, expression of results and reporting. Two annexes extend the method: Annex A covers atomic absorption spectrometry (AAS) for nickel in combined filtrates; Annex B provides a statistical report from interlaboratory tests.

Key topics and technical requirements

Scope and range: Designed for ferronickel samples with 15–60 % nickel (m/m).

Analytical principle:

Dissolution of test portion in nitric (and where needed, HF/HClO4) acids.
Removal of silica by perchloric acid and filtration.
Precipitation of nickel as the nickel–dimethylglyoxime complex from a tartro‑ammoniacal medium, two successive precipitations and gravimetric weighing after drying at 150 °C.
Determination of residual nickel in filtrates by atomic absorption spectrometry (Annex A) for correction.

Reagents and apparatus: Lists required reagents (e.g., dimethylglyoxime solution, tartaric acid, HF, HClO4) and calibrated glassware per ISO specifications. Safety warnings highlight hazards of hydrofluoric and perchloric acid and recommend appropriate fume-cupboard use.

Precision and validation: Method performance was assessed via an interlaboratory programme (7 countries, 20 laboratories, 39 analysts, 8 commercial ferronickel samples). Annex B documents repeatability and reproducibility data and statistical treatment following ISO principles.

Reporting: Specifies calculation formulae, correction for nickel remaining in filtrates, and required information in the test report.

Practical applications

Quality control and incoming/outgoing inspection of ferronickel in ferroalloy and stainless-steel production.

Metallurgical laboratories needing a traceable, standardized method for nickel determination.

Situations where gravimetric confirmation is required alongside instrumental methods (AAS) for accuracy and verification.

Method validation, proficiency testing, and interlaboratory comparisons within alloy analysis programs.

Related standards

ISO 6352:1985 (identical international text)

Referenced laboratory glassware and precision standards: ISO 38511, ISO 648, ISO 1042, ISO 5725, ISO 3534 (for apparatus and statistical procedures)

Keywords: EN 26352:1991, ISO 6352:1985, ferronickel, nickel determination, dimethylglyoxime gravimetric method, atomic absorption, gravimetric analysis, repeatability, reproducibility, ferroalloys.

EN 26352:1991 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications

Who should use this standard

Related standards

Технические детали

ISO 6352:1985

Ferronickel — Determination of nickel content — Dimethylglyoxime gravimetric method

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