What is ISO 17226-1 about?
ISO 17226-1 is the first part of the multi-series ISO 17226. ISO 17226-1 specifies a method for the determination of free and released formaldehyde content in leather. This method, based on high-performance liquid chromatography (HPLC), is selective and not sensitive to coloured extracts and is intended to be used for the 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 of use.
Who is ISO 17226-1 for?
ISO 17226-1 on the determination of formaldehyde content in leather is useful for:
- Leather manufacturing industries
- Leather testers
Why should you use ISO 17226-1?
Formaldehyde is widely used in the synthesis of various leather chemicals due to its high reactivity and low cost. It is introduced into leather when applying the chemicals to processing and then released during storage and use of leather, which may pose a potential risk to human health. The existing method for determining formaldehyde in leather is helpless to deal with complicated chemicals. ISO 17226-1 determination of free and released formaldehyde content in leather.
Determination of free and released formaldehyde in leathers will improve the quality levels of the leather soften the leather and fulfill the requirements of the customers.
High-quality goods will satisfy the needs and comfort the end-users and it will lead to an increase in the demand for the good.
What is changed since the last update?
BS EN ISO 17226-1:2021 supersedes ISO 17226-1:2018. BS EN ISO 17226-1:2021 includes some technical changes with respect to ISO 17226-1:2018. These include:
- The listing of reagents has been reorganized
- The composition of the dinitrophenylhydrazine (DNPH) solution has changed. It no longer contains concentrated o-phosphoric acid. Under acid conditions some extracted synthetic tanning agents and resins can continue to release formaldehyde over time, giving incorrect high results.
- With the change in composition of the DNPH solution, the reaction time limits in the previous edition are no longer necessary. The reaction time and temperature have been increased to 180 min and 50 °C, respectively.