New ISO Standards for Determination of Formaldehyde in Leather ISO 17226-1:2008 and ISO 17226-2:2008
Under the joint effort of the CEN Technical Committee CEN/TC 289 (Leather) and the IUC Commission, IULTCS, two new ISO standards, ISO 17226-1 and ISO 17226-2, were published on 1 May 2008 for the chemical determination of formaldehyde content in leather.
ISO 17226-1:2008 Leather – Chemical determination of formaldehyde content – Part 1: Method using high performance liquid chromatography
ISO 17226-2:2008 Leather – Chemical determination of formaldehyde content – Part 2: Method using colorimetric analysis
These two standards cancel and replace ISO/TS 17226:2003, which has been technically revised.
Highlights in the new ISO 17226-1:2008 and ISO 17226-2:2008 : In case of dispute on the result, ISO 17226-1:2008 (i.e., HPLC method) shall be used in preference to ISO 17226-2:2008 (colorimetric method) for determination of the conformance. For the HPLC method (i.e., ISO 17226-1:2008), the wavelength setting for UV detection has been changed to 360nm (cf. 350nm in ISO/TS 17226:2003).
For sampling and preparation of samples, conditioning of samples (according to ISO 2419) prior to test is not required in the new ISO 17226-1 & 2:2008.
Add a new step for presenting the result on the basis of the dry substance. This is calculated by multiplying the formaldehyde content by the factor of 100/(100 – w), where w is the moisture content (in %) of the leather sample determined in accordance with ISO 4684.
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