ISO 19070 Leather - Test for Chemical Determination of N-Methyl-2-Pyrrolidone (NMP) in Skin

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 19070 testing. ISO 19070 specifies a method for determining the amount of N-methyl-2-pyrrolidone (NMP) in leather and leather components. This method can also be used for the determination of N-ethyl-2-pyrrolidone (NEP) in the skin.

The test sample is extracted using acetone in an ultrasonic bath at 50°C for 1 hour. An aliquot is then analyzed using a gas chromatograph with a mass selective detector (GC-MS).

ISO 19070 specifies a method for the determination of N-methyl-2-pyrrolidone (NMP) in skin. NMP is a commonly used solvent in the leather industry for degreasing, dyeing and finishing. However, NMP is a toxic substance that can have adverse effects on human health, and its use is regulated by various national and international laws.

The method described in ISO 19070 involves extracting NMP from a skin sample using a mixture of water and polar organic solvent. The extract is then analyzed using gas chromatography (GC) with flame ionization detection (FID) or mass spectrometry (MS) detection.

The standard provides details on sample preparation, extraction procedure, calibration of GC equipment, and calculation of results. The method is applicable to all leather types, including rawhide, vegetable tanned leather and chrome tanned leather.

ISO 19070 specifies a limit of detection (LOD) of 0,1 mg/kg and a limit of determination (LOQ) of 0,5 mg/kg for NMP in skin. The standard also recommends the use of appropriate safety measures such as protective gloves and ventilation systems during sample preparation and analysis.

Overall, ISO 19070 provides a reliable and standardized method for the determination of NMP in leather that can help ensure compliance with regulatory requirements and support consumer safety.

EUROLAB assists manufacturers with ISO 19070 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.