SIST ISO 6352:1997 PDF

Name: SIST ISO 6352:1997 — Ferronickel -- Determination of nickel content -- Dimethylglyoxime gravimetric method
SKU: SIST ISO 6352:1997
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Ferronickel -- Determination of nickel content -- Dimethylglyoxime gravimetric method

Название (английский):

SIST ISO 6352:1997

Ferronickel -- Determination of nickel content -- Dimethylglyoxime gravimetric method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 6
Дата публикации:: 1 мая 1997 г.
ICS:: 77.100
Технический комитет:: IFEK - Ferrous metals

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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

ISO 6352:1985 specifies a gravimetric dimethylglyoxime (DMG) method for determining nickel content in ferronickel. The method applies to nickel contents in the range 15–60 % (m/m) and sets out the principle, reagents, apparatus, sampling, detailed procedure, expression of results and the test report. Two annexes supplement the method: Annex A describes atomic absorption spectrometry (AAS) for determining residual nickel in combined filtrates, and Annex B gives a statistical report of interlaboratory tests.

Key topics and requirements

Scope and principle: Dissolve a weighed test portion, remove silica (perchloric acid dehydration), precipitate nickel as the dimethylglyoxime complex from a tartrato‑ammoniacal medium, collect, dry and weigh the precipitate; correct for residual nickel in filtrates by AAS.

Reagents and apparatus: Specifies analytical‑grade reagents (nitric, hydrochloric, perchloric, hydrofluoric acids; tartaric acid; ammonium hydroxide; DMG in ethanol) and calibrated glassware (pipettes, volumetric flasks, fritted glass crucible, PTFE beaker for high‑silicon samples).

Safety warnings: Emphasizes hazards associated with perchloric acid (oxidizing, explosive mixtures with organics) and hydrofluoric acid (severe skin burns). Perchloric work must be performed in suitable fume cupboards.

Procedure details: Test‑portion mass, dissolution steps, silica filtration, two successive DMG precipitations, drying at 150 °C, and combining filtrates for AAS analysis per Annex A.

Quality and precision: Provides calculation method and precision data from interlaboratory studies. Representative precision figures: repeatability r ≈ 0.13% (15–30% Ni) and 0.19% (31–45% Ni); reproducibility R ≈ 0.24% and 0.35% respectively. Combined filtrates should not exceed about 0.2% Ni in the original sample.

Applications and users

Routine chemical analysis and quality control in ferroalloy plants and metallurgical laboratories.

Incoming inspection and certification for buyers, sellers and customs testing of ferronickel consignments.

Laboratories performing comparative testing or method validation where a standardized gravimetric reference method is required.

Useful for regulatory compliance, specification verification and research into nickel recovery or alloy composition.

Related standards

ISO 5725 - Precision of test methods (repeatability and reproducibility)

ISO 1042, ISO 648, ISO 3851 - Laboratory glassware specifications

ISO 3534 - Statistical vocabulary and symbols

Keywords: ISO 6352, ferronickel, nickel determination, dimethylglyoxime, gravimetric method, atomic absorption, ferroalloys, laboratory procedure, nickel analysis.

SIST ISO 6352:1997 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

Технические детали

ISO 6352:1985

Ferronickel — Determination of nickel content — Dimethylglyoxime gravimetric method

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