NF EN ISO 6145-11

NF EN ISO 6145-11

November 2008
Standard Current

Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 11 : electrochemical generation

ISO 6145-11:2005 specifies a method for the preparation of calibration gas mixtures by using electrochemical generation of a calibration component and introduction into a complementary gas flow. By alteration of the gas flow or the charge passed through the cell electrolyte, it is possible to change the composition of the gas mixture. The relative expanded uncertainty of the calibration gas content, U, obtained by multiplying the relative combined standard uncertainties by a coverage factor, k = 2, is not greater than 5 %. The method described in ISO 6145-11:2005 is intended to be applied to the preparation of calibration gas mixtures in the volume fraction ranges (0,1 to 250) x 10-6.

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Main informations

Collections

National standards and national normative documents

Publication date

November 2008

Number of pages

22 p.

Reference

NF EN ISO 6145-11

ICS Codes

71.040.40   Chemical analysis

Classification index

X20-205-11

Print number

1 - 03/11/2008

International kinship

ISO 6145-11:2005

European kinship

EN ISO 6145-11:2008
Sumary
Gas analysis - Preparation of calibration gas mixtures using dynamic volumetric methods - Part 11 : electrochemical generation

ISO 6145-11:2005 specifies a method for the preparation of calibration gas mixtures by using electrochemical generation of a calibration component and introduction into a complementary gas flow. By alteration of the gas flow or the charge passed through the cell electrolyte, it is possible to change the composition of the gas mixture. The relative expanded uncertainty of the calibration gas content, U, obtained by multiplying the relative combined standard uncertainties by a coverage factor, k = 2, is not greater than 5 %.

The method described in ISO 6145-11:2005 is intended to be applied to the preparation of calibration gas mixtures in the volume fraction ranges (0,1 to 250) x 10-6.

Table of contents
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  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Mode opératoire
    2
  • 3.1 Principe
    2
  • 3.2 Gaz de complément
    2
  • 3.3 Systèmes électrolytiques de génération de gaz
    2
  • 3.4 Appareillage
    3
  • 3.5 Préparation du mélange de gaz
    3
  • 4 Évaluation de l'incertitude
    6
  • 4.1 Introduction
    6
  • 4.2 Sources d'incertitude
    6
  • 4.3 Incertitude de fraction volumique
    7
  • 5 Conception de la cellule électrochimique
    8
  • Annexe A (informative) Exemple de cellule électrochimique disponible dans le commerce
    9
  • Annexe B (informative) Schémas de cellules électrolytiques de génération de gaz
    11
  • Annexe C (informative) Schéma d'une alimentation électrique vers la cellule de génération de gaz
    12
  • Annexe D (informative) Tensions de décomposition de solutions entre électrodes de platine lisses
    13
  • Bibliographie
    14
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