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  • BSI
    BS EN ISO 4048:2018 Leather. Chemical tests. Determination of matter soluble in dichloromethane and free fatty acid content
    Edition: 2018
    $313.97
    / user per year

Description of BS EN ISO 4048:2018 2018

This document specifies a method for the determination of the substances in leather which are soluble in dichloromethane. This method is applicable to all types of leather.

Not all fatty and similar substances can be extracted from leather with organic solvents; they may be in part soluble and partly bound to the leather. On the other hand, the solvent can dissolve non-fatty substances, for example sulfur and impregnants, both of which cause difficulty in the determination of the acid value and saponification value of the fat.

This document includes two techniques for extraction of the fatty substances: 1) extraction using the Soxhlet apparatus; and 2) extraction using a pressurized extraction system.

As the extraction is frequently done in conjunction with determination of the free fatty acid content of the leather, a suitable procedure for determination of the free fatty acids extracted by this method is included.

The apparatus and technique described in this method are also suitable for the extraction by solvents other than dichloromethane (although the temperature conditions may need to be varied for high pressure extraction).



Standard NumberBS EN ISO 4048:2018
TitleLeather. Chemical tests. Determination of matter soluble in dichloromethane and free fatty acid content
StatusUnder Review
Publication Date2018-07-23
ReplacesBS EN ISO 4048:2008
Identical National Standard OfEN ISO 4048:2018, ISO 4048:2018
DescriptorsFatty acids, Leather, Determination of content, Chemical analysis and testing, Solvent extraction methods, Reproducibility, Methylene dichloride, Extraction methods of analysis
ICS59.140.30 Leather and furs
CommitteeTCI/69
ISBN978 0 580 98544 7
PublisherBSI
Pages18

The following editions for this book are also available...

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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