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Code de la Classification internationale pour les normes (ICS)
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Code de l’organisme d’élaboration de normes (OEN)
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Statut
Code de la Norme nationale du Canada (NNC)
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Affichage 7701 - 7710 de 7874
Sulphuric acid and oleum for industrial use — Determination of iron content — 2,2'- Bipyridyl s...
The principle is based on evaporation of the test portion, taking up by means of hydrochloric acid and reduction of iron(III) by means of hydroxylammonium chloride. Formation of an iron(II) 2,2'-bipyridyl complex in a buffered medium at a pH value between 4.5 and 6. Spectrophotometric measurement of the coloured complex at a wavelength of about 522 nm. The method is applicable to the…
Éditeur :
ISO
Statut :
Annulée
Date de publication :
1968-11-30
Code(s) de l'ICS :
71.060.30
Sodium tripolyphosphate and sodium pyrophosphate for industrial use — Determination of iron content ...
Applicable to products having Fe contents of more than 0.001 % (m/m). Preliminary hydrolysis of polyphophates by prolonged boiling in the presence of hydrochloric acid. Reduction of iron(III) by means of hydroxylammonium chloride. Formation of the iron(II)-2,2'-dipyridyl complex in the presence of ammonium acetate at pH of 3.1 and a temperature of 75 °C (under the test conditions the…
Éditeur :
ISO
Statut :
Annulée
Date de publication :
1968-09-30
Code(s) de l'ICS :
71.060.50
Phosphoric acid for industrial use — Determination of iron content — 2,2'- Bipyridyl spectropho...
Applicable to products having Fe contents of more than 0.001 % (m/m). Preliminary hydrolysis of polyphophate acids by prolonged boiling in the presence of hydrochloric acid. Reduction of iron(III) by means of hydroxylammonium chloride. Formation of the iron(II)-2,2'-dipyridyl complex in the presence of ammonium acetate at pH of 3.1 and a temperature of 75 °C (under the test conditions the…
Éditeur :
ISO
Statut :
Annulée
Date de publication :
1968-09-30
Code(s) de l'ICS :
71.060.30
Chemical analysis of magnesium and magnesium alloys — Polarographic determination of zinc (zinc cont...
Éditeur :
ISO
Statut :
Annulée
Date de publication :
1968-07-31
Code(s) de l'ICS :
77.120.20
Sodium carbonate for industrial use — Determination of iron content — 2,2'- Bipyridyl photometr...
Éditeur :
ISO
Statut :
Annulée
Date de publication :
1968-04-30
Code(s) de l'ICS :
71.060.50
Third supplement - Lamp caps and holders together with gauges for the control of interchangeability ...
Subscribe to IEC 60061 Database to access the full and updated content of the series.
Éditeur :
IEC
Statut :
Révisé
Date de publication :
1966-12-31
Code(s) de l'ICS :
29.140.10
Troisième complément - Culots de lampes et douilles ainsi que calibres pour le contrôle de l'in...
Subscribe to IEC 60061 Database to access the full and updated content of the series.
Éditeur :
IEC
Statut :
Révisé
Date de publication :
1966-12-31
Code(s) de l'ICS :
29.140.10
Methods of chemical analysis of manganese ores — Determination of titanium content
Éditeur :
ISO
Statut :
Annulée
Date de publication :
1966-11-30
Code(s) de l'ICS :
73.060.20
Methods of chemical analysis of manganese ores — Determination of calcium oxide content and magnesiu...
Éditeur :
ISO
Statut :
Annulée
Date de publication :
1966-11-30
Code(s) de l'ICS :
73.060.20
Second supplement Lamp caps and holders together with gauges for the control of interchangeability a...
Subscribe to IEC 60061 Database to access the full and updated content of the series.
Éditeur :
IEC
Statut :
Révisé
Date de publication :
1965-12-31
Code(s) de l'ICS :
29.140.10