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ISO 5997:1984

Chromium ores and concentrates -- Determination of silicon content -- Molecular absorption spectrometric method and gravimetric method

General information

Valid from 01.11.1984
ICS Groups
73.060.30 Chromium ores
Directives or regulations
None

Standard history

Status
Date
Type
Name
01.11.1984
Main
ISO 5997:1984
The molecular absorption spectrometric method (A) is applicable to products having silicon contents from 0,05 to 0,5 % (m/m), the gravimetric method (B) is applicable to products having silicon contents from 0,5 to 15 % (m/m). ISO 5997 should be read in conjunction with ISO 4297. Specifies among other things principle, reagents, apparatus, procedure, spectrometric measurement (method A only) and expression of results.

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Standard monitoring
English (PDF 386 KB)

Related products

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ISO 6153:1989

Chromium ores -- Increment sampling
Newest version Valid from 17.08.1989
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ISO 6154:1989

Chromium ores -- Preparation of samples
Newest version Valid from 17.08.1989
Main

ISO 8889:1988

Chromium ores and concentrates -- Determination of aluminium content -- Complexometric method
Newest version Valid from 04.02.1988
Main

ISO 6130:1985

Chromium ores -- Determination of total iron content -- Titrimetric method after reduction
Newest version Valid from 07.11.1985

Standards designation

EVS Estonian standard
EN European standard (published by an CEN or CENELEC)
EN ISO International standard adopted as an European standard
ISO International Organization for Standardization’s standard
IEC International Electrotechnical Commission’s standard
HD CENELEC’s harmonisation document
   
EVS-EN European standard implemented in Estonia
EVS-EN ISO International standard adopted in Europe and implemented in Estonia
EVS-EN ISO/IEC International standard/International electrotechnical standard adopted in Europe and implemented in Estonia
EVS-IEC International electrotechnical standard implemented in Estonia
EVS-ISO International standard implemented in Estonia
   
A, AMD amedment
+A a full standard plus the amendment
/A only amendment
COR, AC corrigendum
+COR a full standard plus the corrigendum
NA national annex
+NA a full standard plus the national annex
/NA only national annex
TS technical specification
TR technical report
CWA agreement, developed by a CEN or CENELEC
prEVS-EN (etc) draft standard
   
et the standard is in Estonian only
en the standard is in English only
et-en the standard is in Parallel text Estonian-English