QB/T 2722-2005 Leather chemical tests - Determination of nitrogen content and "cortex": Titration method

This standard specifies the determination method of nitrogen content and "cortex" in leather - titration method. This standard is applicable to all types of leather. QB/T 2722-2005 Leather chemical test - Determination of nitrogen content and "cortex": titration method QB/T2722-2005 Standard download decompression password: www.bzxz.net

ICS 59.140
Classification number: Y45
Registration number: 15774-2005
Light Industry Standard of the People's Republic of China
QB/T2722-2005
Replaces QB/T3812.17-1999
Chemical tests
Determination of nitrogen content and "cortex": Titration methodWww.bzxZ.net
Lealther-Chemical tests-Bctcrrnination of nitrogen content and\hide substance\-Titrimetric Tmethod(ISO 5397: 1984, Leather—Determination of nitrogen content and\hidc substance\Titrimetric metlhod, MOD)2005-03-19 Issued
National Development and Reform Commission of the People's Republic of China 2005-09-01 Implementation
QB/T2722-2005
This standard is in accordance with Q/T3R12.17-199 "Determination of mitrogen content and safety of leather products by liquid chromatography-mass spectrometry" This standard is revised 1S0537: [984 Leuther-Delerninalio of mitrogen content of leather products by liquid chromatography-mass spectrometry contentand"hidesibgtauce"Titrimemicmethnd, the standard is based on the Joint Committee of International Chemical Engineers and Chemists (JLTCS) standard TUC1
According to the actual situation in my country, this standard has made the following technical modifications after in-depth study of SO5397:184: - The explanatory content in the (Introduction) was adjusted to 4 in the original link: - The explanatory content in the [Normal Reference] was adjusted to 4 in the "Normative Reference"; the original referenced SO standard was changed to the referenced standard of our ancestors, and the reference to the 0 test instrument was cancelled: 17.1 and 7.2 in the original standard were adjusted:
8 in the original standard was adjusted .1 "Preparation of test specimens" is adjusted to 7.2: The order of the original standard 8.2 and 8.3 is adjusted. This standard is modified in an abbreviated manner. In addition to the ISO standard, the following are added: - "This international standard" is changed to "sample standard" - "decimal point" is used instead of "return sign". Compared with QB3812.17-1999, this standard has the following major changes: - Added 2 normative reference documents; - Added "Preparation of test specimens" - 9.1.1 Calculation formula The source table of S05397:194 is smaller than that of this standard! The Industry Federation proposed that this standard should be the National Standardization Committee of the Industry.
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