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SN/T 4692-2016 English PDF

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SN/T 4692-2016: Leather - Chemical tests - Determination of residual glycol ethers
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PDF similar to SN/T 4692-2016


Standard similar to SN/T 4692-2016

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Basic data

Standard ID SN/T 4692-2016 (SN/T4692-2016)
Description (Translated English) Leather - Chemical tests - Determination of residual glycol ethers
Sector / Industry Commodity Inspection Standard (Recommended)
Classification of Chinese Standard Y45
Word Count Estimation 14,139
Date of Issue 2016-12-12
Date of Implementation 2017-07-01
Regulation (derived from) State-Quality-Inspection-Accredidation (2016) No.590
Issuing agency(ies) General Administration of Customs

SN/T 4692-2016: Leather - Chemical tests - Determination of residual glycol ethers

---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-Chemical tests-Determination of residual glycol ethers People's Republic of China Exit Inspection and Quarantine standards Leather Chemical Testing Glycol Ethers Organic Solvents Determination of the amount of residue 2016-12-12 released 2017-07-01 implementation People's Republic of China General Administration of Quality Supervision, Inspection and Quarantine released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted by Shenzhen Academy of Inspection and Quarantine, Shenzhen Entry-Exit Inspection and Quarantine of the People's Republic of China, Shenzhen Occupation Technology academy. The main drafters of this standard. Lin Junfeng, Wang Chengyun, Jiang Fan, Xie Tang Church, Chu is clear, Liu Caiming, Li Lixia, Li Bin. Leather Chemical Testing Glycol Ethers Organic Solvents Determination of the amount of residue

1 Scope

This standard specifies the leather and its products in 15 kinds of glycol ether organic solvents residual gas chromatography - mass spectrometry and gas chromatography Test method. This standard applies to the determination of residues of 15 kinds of glycol ethers in leather and its products.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. QB/T 2706 leather chemical, physical, mechanical and color fastness test sampling site QB/T 2707 Leather Physical and mechanical test specimen preparation and conditioning QB/T 2716 leather chemical test sample preparation

3 principle

Ethylene glycol ether samples were extracted with ethyl acetate, purified by solid phase extraction column, concentrated to volume, the sample solution by gas chromatography - mass spectrometry Instrument for detection, using full scan mode for qualitative, according to the selected ion for external standard quantification; or gas chromatography - flame ionization detector Testing, using retention time for qualitative, according to the peak area of external standard method.

4 Reagents and materials

4.1 methanol. Chromatographic pure. 4.2 Ethyl acetate. Chromatographic purity. 4.3 15 kinds of glycol ether standard substance Purity ≥ 97%, see Appendix A. 4.4 standard stock solution respectively accurately weighed 0.0500g glycol ether standard material (4.3) to 50mL brown volumetric flask, respectively, with a Alcohol (4.1) constant volume, formulated into a concentration of 1000mg/L standard stock solution. Note. Standard stock solutions are stored in a refrigerator at 0 ° C to 4 ° C for a period of 3 months. 4.5 series of standard working solution.According to the need to accurately remove a certain volume of standard stock solution (4.4), and then diluted with methanol (4.1) into a suitable concentration Degree of mixed standard working solution. Depending on the instrument, see Appendix B for the concentrations given. Note. The standard working solution is now available. Different instruments under different working conditions measured linear range is different, 15 kinds of glycol ether standard solution concentration range The linearity around 0.1 mg/L to 5 mg/L (gas chromatography-mass spectrometry) or 0.1 mg/L to 20 mg/L (gas chromatography) has been shown to satisfy Claim. 4.6 SPE cartridge, polar silica packing 6mL (1g), or equivalent. 4.7 organic phase filter pore size 0.45μm.

5 instruments and equipment

5.1 Gas Chromatography - Mass Spectrometer with Electron Impact Ionization Source (EI).

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