ISO 2227:1972

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Formaldehyde solutions for industrial use -- Determination of formaldehyde content

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ISO 2227:1972

Formaldehyde solutions for industrial use -- Determination of formaldehyde content

PUBLISH DATE 1972
ISO 2227:1972

The specified method is applicable to HCHO contents between 25.5 and 45%.

The field of application may be extended by suitably modifying the mass of the test portion.

The principle consists in the reaction of the test solution with a neutral sodium sulphite solution, and acidimetric titration of the liberated sodium hydroxide in presence of thymolphthalein as indicator.

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