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.
EN ISO 17226-2:2019 history
2019EN ISO 17226-2:2019 Leather - Chemical determination of formaldehyde content - Part 2: Method using colorimetric analysis
2008EN ISO 17226-2:2008 Leather - Chemical determination of formaldehyde content - Part 2: Method using colorimetric analysis (Incorporating corrigendum April 2009)