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Leather and fur - Chemical tests - Determination of chromium (VI) content: Chromatographic method
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Basic data
| Standard ID | GB/T 38402-2019 (GB/T38402-2019) |
| Description (Translated English) | Leather and fur - Chemical tests - Determination of chromium (VI) content: Chromatographic method |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | Y46 |
| Classification of International Standard | 59.140.30 |
| Word Count Estimation | 18,119 |
| Date of Issue | 2019-12-31 |
| Date of Implementation | 2020-07-01 |
| Quoted Standard | GB/T 6682; GB/T 22807; QB/T 1267; QB/T 1272; QB/T 1273; QB/T 2706; QB/T 2716; QB/T 2717 |
| Adopted Standard | ISO 17075-2-2017, MOD |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
| Summary | This standard specifies the method for the determination of hexavalent chromium content in leather and fur by chromatography. This standard applies to the determination of hexavalent chromium content in various leathers, furs and their products. |
GB/T 38402-2019: Leather and fur - Chemical tests - Determination of chromium (VI) content: Chromatographic method
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Leather and fur--Chemical tests--Determination of chromium (VI) content. Chromatographic method
ICS 59.140.30
Y46
National Standards of People's Republic of China
Leather and fur chemical tests for hexavalent chromium
Determination. chromatography
Leatherandfur-Chemicaltests-Determinationofchromium (Ⅵ) content.
[ISO 17075-2..2017, Leather-Chemicaldeterminationofchromium (Ⅵ)
contentinleather-Part 2. Chromatographicmethod, MOD]
2019-12-31 release
2020-07-01 implementation
State Administration of Market Supervision
Published by the National Standardization Administration
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard uses the redrafting method to modify and adopt ISO 17075-2..2017 "Chemical Determination of Hexavalent Chromium Content in Leather
Section. Chromatography.
Compared with ISO 17075-2..2017, this standard has more structural adjustments.Appendix A gives this standard and ISO 17075-2..2017.
List of chapter number comparisons.
There are technical differences between this standard and ISO 17075-2..2017.Appendix B gives the corresponding technical differences and their causes.
List.
This standard also makes the following editorial changes.
--- The standard name was revised to `` Determination of hexavalent chromium content in leather and fur chemical tests. chromatography '';
--- Modified the column models and specifications in Appendix B and Appendix C of ISO 17075-2..2017, and the instrument parameters have been changed accordingly.
Adjustment;
--- Change the verification data in Annex A of ISO 17075-2..2017 to the verification results of domestic laboratories;
--- Modify the test data in ISO 17075-2..2017 Appendix D to laboratory test data in China.
This standard is proposed by the China Light Industry Federation.
This standard is under the jurisdiction of the National Leather Industry Standardization Technical Committee (SAC/TC252).
Drafting organizations of this standard. Guangzhou Spectrum Linsheng Technology Co., Ltd., Beijing Xianming Leshi Technology Development Co., Ltd., Guangzhou Inspection and Certification
Group Co., Ltd., China Leather Shoes Research Institute Co., Ltd., Fengan Leather Industry Co., Ltd., Zhejiang Shenghui Chemical Co., Ltd., Jiangxi Long
China Leather Co., Ltd., Shengguo (Dongguan) New Material Technology Co., Ltd., Guangzhou Panyu Vocational and Technical College, Shaanxi University of Science and Technology.
The main drafters of this standard. Lu Shenghua, Liu Kejiang, Han Wanqing, Sang Jun, Xu Quanhui, Yuan Benan, Jiang Deyun, Sun Shizhen, Chen Qunxiong, Zeng Hao,
Xu Qunna and Huang Min.
Leather and fur chemical tests for hexavalent chromium
Determination. chromatography
1 Scope
This standard specifies a method for the determination of hexavalent chromium in leather and fur by chromatography.
This standard applies to the determination of hexavalent chromium in various types of leather, fur and their products.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 6682 Analytical laboratory water specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)
GB/T 22807 Determination of hexavalent chromium in leather and fur chemical tests. spectrophotometric method (GB/T 22807-2019,
(ISO 17075-1..2017, MOD)
QB/T 1267 Sampling site for fur chemical, physical and mechanical, color fastness test (QB/T 1267-2012, ISO 2418.
2002, MOD)
Preparation of QB/T 1272 fur chemical test samples (QB/T 1272-2012, ISO 4044..2008, MOD)
QB/T 1273 Determination of volatiles in fur chemical test (QB/T 1273-2012, ISO 4684..2005, MOD)
QB/T 2706 Leather chemical, physical, mechanical and color fastness test samples (QB/T 2706-2005, ISO 2418.
2002, MOD)
QB/T 2716 Preparation of leather chemical test samples (QB/T 2716-2018, ISO 4044..2008, MOD)
QB/T 2717 Determination of volatiles in leather chemical test (QB/T 2717-2018, ISO 4684..2005, MOD)
3 Principle
Soluble hexavalent chromium in the sample was extracted with phosphate buffer solution, and filtered with ion exchange color with UV-VIS or DAD detector
Spectrophotometric determination of hexavalent chromium in the extract.
4 Reagents and materials
Unless otherwise stated, all reagents used are analytical grade.
4.1 Water, test water shall meet the requirements of Grade III water in GB/T 6682.
4.2 Phosphate buffer solution (0.1mol/L). Dissolve 22.8g of dipotassium hydrogen phosphate (K2HPO4 · 3H2O, relative molecular weight 228) in
1000mL distilled water, adjust the pH to 8.0 ± 0.1 with phosphoric acid solution (4.3), and discharge with argon or nitrogen (4.7) or ultrasonic water bath
air.
Note. Phosphate buffer solution is recommended to be used now. It can also be stored at 0 ℃ ~ 4 ℃ for one week. Return to room temperature before use and vent the air again.
4.3 Phosphoric acid (H3PO4) solution. Dilute 700mL phosphoric acid (85% mass fraction, density 1.71g/mL) with distilled water to
1000mL.
Note. First add.200mL distilled water to a 1000mL volumetric flask, then add 700mL phosphoric acid, and make up to volume with distilled water.
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