This standard specifies the determination method of volatile matter in leather. This standard is applicable to all types of leather. QB/T 2717-2005 Leather Chemical Test Determination of Volatile Matter QB/T2717-2005 Standard download decompression password: www.bzxz.net

ICS 59.140
Classification number, Y45
Preparation number: 15769-2005
Light Industry Standard of the People's Republic of China
QB/T2717—2005
Q/T3812.12—1999
Chemical tests
Determination of volatile
Leather-Chemical tests-..Determinatlon of volatile2005-03-19 Issued
National Development and Reform Commission of the People's Republic of China2005-09-01 Implementation
This standard is a reorganization of QB/T3812.12-1999 <Determination of the content of leather and other selected volatiles>! ：QB/T2717—2005
This standard modifies the standard IIC5 Detemmination of volatile matter (Detemmination of volatile) of the International Union of Leather Engineers and Chemists (ILICS), which has been converted into [ISO/DlS46B4:2003≤Leather Chemical tests—Determination of volatile matter" (Leather Chemical tests—Determination of volatile matter) international standard. Solution: According to the actual situation in China, this standard has made the following technical modifications to the standard 5: Adjust the description content in 1. Scope to 3. Points: The referenced content in "Deprecated normative citations" is rewritten as the relevant standard cited in China; - According to the practice of China, 6. Sample part is further refined and divided into 6.1, 6.2 and 6.3; the order of 10 and 6.3 in the original standard is adjusted. The technical standard has also made the following editorial changes: 1UC has been deleted, the preface of the standard has been changed to "this standard", "replaces the decimal point" with ", and compared with QB/T3F12.12-1999, the main changes are as follows: 2 normative references have been added, "trial punching system" has been added, "operating precautions" have been added: This standard was issued by China Light Industry Federation: This standard is under the jurisdiction of the National Standardization Technical Committee (SAC/C252) Drafting units of this standard: China Fourth Footwear Industry Research Institute: The author of this standard: Zhao Liwen. This standard was first issued in October 1984 as the original national National standard GB4689.12-1984, converted into light industry standard QB/T3812.12-1999 in April 1999, this is the first revision. From the beginning of this year, it will replace the original national light industry standard Q/T12.12-1999 Determination of other volatiles in leather water branch issued by the National Bureau of Light Industry.
1 Standard national
Leather chemical test: Determination of volatiles
This standard specifies the determination method of leather volatiles, and this standard is applicable to various types of leather. 2 Normative references Www.bzxZ.net
QR/T 2717—2005
The following documents become the clauses of this standard through reference. For all referenced documents with a specified date, all subsequent revisions (excluding the contents of errors) and revised versions are not applicable to this standard. However, the parties who have reached an agreement on this standard are encouraged to study whether the latest versions of these documents can be used. For referenced documents with a specified date, their latest revisions are applicable to this standard. Sampling locations for physical, mechanical and colorimetric tests (ISO2419: 2002, MOD) Preparation and conditioning of leather physical and mechanical acid tests (TSO2419: 2002, MO) QB/12707—2005
Preparation of leather chemical tests (ISO4044: 1977, MOD) QB/T2716—2005
QB/T271R-2005
Leather chemical tests Diazomethane Determination of extractables (ISO4048:1977, MOD) 3 Terms and definitions
The following terms and definitions apply to this standard: 3.1
Volatile matter
The amount of volatile matter in leather reduced when the leather is dry-burned at (102±2)℃. 4 Principle
The cut sample is dried in an oven at (1:2)0 for ten minutes. The content of volatile matter is determined by the change in the mass spectrometer. This method is used to determine the content of volatile matter in leather. It is impossible to determine the moisture content of the leather, because other volatile substances will also volatilize, the oil and fat will be oxidized when the temperature rises, and some of the absorbed moisture will remain in the leather after drying. 5.1 Weighing with a flat bottom, shallow L1, a polished glass plate, or a flat bottom open plate Note: The small plate with an opening has a better quality than the opening plate. 5.2 Drying oven, the density can be controlled within <102±2) Attached specification: 5.3 Analytical flat plate, accurate to 0.001g.
6 Sampling and sample preparation
B.1 Sampling
Carry out according to the provisions of QB/T2706-2005. If it is not possible to sample from the standard position (such as directly from the clothes), the sampling situation should be detailed in the test report.
6.2 Preparation of the sample
Perform the provisions of QB/T2716-2005. 1
QB/T2717-2005
6.3 Air conditioning of the sample:
Before weighing the sample, perform the air conditioning according to the provisions of QB/T2.707-2005. 7 Procedure
Weigh the sample in the air, filter it and weigh it with a micro-plate. Weigh 0.01% of the sample with a weighing bottle, dry it at 102 ± 2)℃ for 5h., cool it in an oven for 30min (see 8.2), and then weigh it. Cool for 1 h and weigh until the mass reduction is less than 3% (i.e., 0% of the sample), or the total cooling time reaches 50%. Record the final mass of the sample and calculate the mass of the sample after one operation. 8 Operating precautions 8.1 For extracts containing oxidizable fats, the following steps can be used to obtain specific information. Determine the content of fat and other soluble matter in accordance with the provisions of QB/T2718-2005, determine the mass of the extracted substances in dioxygen solution after drying, calculate the mass fraction of the total sample reduced by an appropriate amount, and subtract the mass fraction of the selected substances from the mass fraction of the benzene extract. The use of this step should be detailed in the test report: 2 If an open pan is used for cooling, only one piece of ink less than 1% can be placed in the desiccator and not more than 2 hours can be placed in the desiccator. 9. Expression of results
For the sample, the mass is expressed in percentage, and the value is expressed in %. The formula is:
The mass before baking is expressed in grams (g); The mass of the sample after baking is expressed in grams (g); 10. The difference between the results of the two tests shall not exceed 2% of the original mass of the sample. Test report
The test report shall include the following contents:
This standard number:
Product name, number, type
Details of the sample, sampling information, and any differences with QBT2746-2005: Test conditions (standard temperature: 20℃/65℃ or 23/50%) Test results (%):
The actual operation of this standard does not differ from that of this standard.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.