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SN/T 4775-2017: Determination of thiurams content in rubber and rubber product--HPLC method
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Determination of thiurams content in rubber and rubber product--HPLC method
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SN/T 4775-2017
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Basic data | Standard ID | SN/T 4775-2017 (SN/T4775-2017) | | Description (Translated English) | Determination of thiurams content in rubber and rubber product--HPLC method | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | G40 | | Classification of International Standard | 59.140.99 | | Word Count Estimation | 10,197 | | Date of Issue | 2017-05-12 | | Date of Implementation | 2017-12-01 | | Regulation (derived from) | State-Quality-Inspection-Accreditation (2017) 228 | | Issuing agency(ies) | General Administration of Customs | SN/T 4775-2017: Determination of thiurams content in rubber and rubber product--HPLC 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.
Determination of thiurams content in rubber and rubber product--HPLC method
ICS 59.140.99
China's entry-exit inspection and quarantine industry standards
Determination of mid-autumn content of rubber and its products
High performance liquid chromatography
Published on.2017-05-12
2017-12-01 implementation
China
The State Administration of Quality Supervision, Inspection and Quarantine issued
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 Regulatory Commission.
This standard was drafted by. Fujian Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China.
The main drafters of this standard are. Mao Shulu, Huang Qiulan, Rong Jiefeng, Li Junfa, Chen Xuecan, You Zhiyong, Chen Dazhi, and Chen Bin.
Determination of mid-autumn content of rubber and its products
High performance liquid chromatography
1 Scope
This standard specifies the HPLC method for the determination of midazolam in rubber and its products.
This standard applies to the determination of the mid-autumn content of rubber and its products.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 6682 Analysis Laboratory Water Specifications and Test Methods
3 Principle
Ultrasonic extraction of thiuram in rubber and its products using acetone as solvent, extracts determined by high performance liquid chromatography, retention time and UV
Spectrogram confirmation, external standard method.
4 Reagents and materials
The test water should meet the secondary water requirements specified in GB/T 6682.
4.1 Acetone, chromatographically pure.
4.2 Methanol, chromatographically pure.
4.3 Acetonitrile, chromatographically pure.
4.4 Thiram (CAS No. 137-26-8), reference material, purity 98.2%.
4.5 1000μg/mL thiuram standard stock solution. Accurately weigh 0.1018g of standard substance (4.4), dissolve with methanol, and transfer to
In a 100 mL volumetric flask, make up to volume with methanol and shake well until use.
4.6 thiuram standard working solution. Pipette a certain volume of thiuram standard stock solution (4.5) into a brown volumetric flask.
Diluted the alcohol to the mark, shake it up, and formulated the standard work of 0.5μg/mL, 1.0μg/mL, 2.0μg/mL, 5.0μg/mL, 10.0μg/mL
Solution.
5 Instruments and Equipment
5.1 Liquid Chromatograph with Diode Array Detector.
5.2 glass extractor, 60mL, with screw cap, with PTFE gasket.
5.3 Analytical balance, the amount of sense is 0.1mg.
5.4 Ultrasonic cleaner, working frequency 40kHz, ultrasonic power 500W.
5.5 Organic membrane, aperture 0.45μm.
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