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Leather. Chemical determination of formaldehyde content -- Method using colorimetric analysis
This document specifies a method for the determination of free and released formaldehyde in leathers.
This method, based on colorimetric analysis, is not intended to be used for a precise quantification of formaldehyde.
The formaldehyde content is taken to be the quantity of free-formaldehyde and formaldehyde extracted through hydrolysis contained in a water extract from the leather under standard conditions.
This process is not absolutely selective for formaldehyde.
Other compounds such as extracted dyes could interfere at 412 nm.
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