NL-3200 AE Spijkenisse
the Netherlands
ing. R.J.Starink
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Fax: +31 181 69 45 43
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INTERLABORATORY STUDY iis17A10
Formaldehyde & pH in Leather
Proficiency test period: October 11 – November 17, 2017
Report form A for late reported test results
Sample #17640: Formaldehyde only
Unit / Reference Method*) / Actual method used
*) / ’Unrounded’
result
*) & **) / Rounded
result cfr.used standard
*) & **)
Formaldehyde content (HPLC) / mg/kg / ISO17226-1
Formaldehyde content (Colorimetric) / mg/kg / ISO17226-2
*) Please see letter of instructions on data entry portal before start of the tests (www.kpmd.co.uk/sgs-iis-cts/)
**) Please do not age or dry the sample
Additional Question for all participants
- Is your laboratory accredited in accordance with ISO/IEC17025 to determine the reported component(s)? No / Yes ***)
Additional Questions when the colorimetric method was used
- Were the reagents checked for absence of formaldehyde? No / Yes ***)
If yes, please give absorbance of reagents: ______
- Was for ’released Formaldehyde’ the sample tested for other compounds which may cause a coloring with acetylacetone? No / Yes ***)
If yes, please give absorbance: ______
- Was the absorbance of the solution corrected for above absorbances? No / Yes ***)
If yes, please give absorbance of the sample solution before and after correction;
______
Remarks on Additional Questions: ______
***) Please circle the right option
Report form B for late reported test results
Sample #17641: pH only
Unit / Reference Method*) / Actual method used
*) / Unrounded
result
*) / Rounded
result cfr.used standard *)
pH of extract
pH of ten times diluted extract
difference between pH of extract and pH of ten times diluted extract
*) Please see letter of instructions on data entry portal before start of the tests (www.kpmd.co.uk/sgs-iis-cts/)
Additional Question for all participants
- Is your laboratory accredited in accordance with ISO/IEC17025 to determine the reported components? No / Yes (please circle the right option)
- Did you use additional steps to wet the sample? (please tick the right option)
o No
o Yes: a vacuum step
o Yes: mixing with water in a disintegrator (eg Waring Blender)
o Yes: soxhlet extraction
o Yes: other
- Which technique was used to agitate/shake the sample solution: (please tick the right option)
o Let stand with occasional agitation
o Shaked mechanically
o Other
- How long (in hours) did you let stand the sample solution (with occasional agitation) or how long (in hours) did you shake mechanically the sample solution in a shaker? ______
Remarks on Additional Questions: ______
Name of laboratory: Date of sample receipt:
Country: City:
Name of contact person: Date of report: