BS EN ISO 3696:1995

What is ISO 3696- Water for analytical laboratory use about?

ISO 3696 discusses water for analytical laboratory use. ISO 3696 specifies the requirements and corresponding test methods for three grades of water for laboratory use for the analysis of inorganic chemicals.

ISO 3696 is not applicable to water for organic trace analysis, to water for the analysis of surface-active agents, or to water for biological or medical analysis.

Who is ISO 3696- Water for analytical laboratory use for?

ISO 3696 on the water for analytical laboratory use is useful for:

• Laboratory owners/managers
• Laboratory technicians
• Water suppliers

Why should you use ISO 3696- Water for analytical laboratory use ?

Analytical laboratories offer services that classify, assay and/or analyze chemical, material, biological, geological, and environmental samples. Type I grade water, also known as Ultrapure Water, is the purest form of water to be produced. It's used for the most critical applications and advanced analytical procedures.

ISO 3696 provides you with test methods for three grades of water for laboratory use for the analysis of inorganic chemicals. ISO 3696 guides you with the classification of the water for laboratory use for the analysis of inorganic chemicals. ISO 3696 provides you with requirements, sampling, and storage of water for laboratory use.  ISO 3696 helps you to maintain the water grades used for laboratory use for the analysis of inorganic chemicals.   

What’s changed since the last update?

BS EN ISO 3696:1995 supersedes BS 3978:1966, which is withdrawn. BS EN ISO 3696:1995 includes some technical changes with respect to BS 3978:1966. These include:

• The single grade of water has been replaced by three grades, of which grade 3 is roughly equivalent to the water specified in the previous edition.
• Residue on ignition is no longer specified and the requirement (for grade 3 water) for residue on evaporation has been tightened.
• Electrical conductivity is now measured at 25 °C instead of 20 °C, and the requirement for grade 3 water has been changed from 1 mS/m to 0.5 mS/m.
• The limit for oxidizable matter for grade 3 water has been tightened.
• Requirements for ammonia content, chloride content and sulphate content are no longer included.