Standard No.:	GB/T 19941.3-2019
Chinese Name:	皮革和毛皮 甲醛含量的测定 第3部分：甲醛释放量
English Name:
ICS Classification:	59.140.30 Leather and furs
Issued by:
Issued on:	2019-12-31
Implemented on:	2020-07-01
Status:	VALID
Language:	English
File Format:	PDF
Word Count:	8000 words
Price(USD):	240 (USD)
Delivery:	via email in 1-3 business day

Leather and fur - Determination of formaldehyde content - Part 3: Formaldehyde emissions

1 Scope

This part of GB/T 19941 specifies a method for determining the emission of formaldehyde from leathers. This method is based on high performance liquid chromatography (HPLC).

This standard is applicable to the determination of formaldehyde emission of various leathers, furs and their products.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 6682 Water for analytical laboratory use - Specification and test methods (GB/T 6682-2008, ISO 3696:1987, MOD)
QB/T 1266 Fur - Physical and mechanical tests - Sample preparation and conditioning (QB/T 1266-2012, ISO 2419: 2006, MOD)
QB/T 1267 Fur - Chemical, physical and mechanical and fastness tests - Sampling location (QB/T 1267-2012, ISO 2418: 2002, MOD)
QB/T 1273 Fur - Chemical tests - Determination of volatile matter (QB/T 1273-2012, ISO 4684: 2005, MOD)
QB/T 2706 Leather - Chemical, physical and mechanical and fastness tests - Sampling location (QB/T 2706-2005, ISO 2418: 2002, MOD)
QB/T 2707 Leather - Physical and mechanical tests - Sample preparation and conditioning (QB/T 2707-2018, ISO 2419: 2012, MOD)
QB/T 2717 Leather - Chemical tests - Determination of volatile matter (QB/T 2717-2018, ISO 4684: 2005, MOD)

3 Principle

A specimen with defined dimensions is held above deionized water in a sealed bottle and is heated at constant temperature for a specific period. Afterwards, the bottle is cooled and the formaldehyde absorbed into the water is analyzed. The water is mixed with 2, 4-dinitrophenylhydrazine, whereby aldehydes and ketones react to give the respective hydrazones. These are separated by means of a reversed-phase HPLC method, detected at specified wavelength and quantified.