SN/T 1628: Evolution and historical versions
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| SN/T 1628-2024 | English | RFQ |
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(Determination of closantel residue in exported animal-derived food)
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SN/T 1628-2024
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| SN/T 1628-2005 | English | 389 |
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Determination of closantel residues in meat and meat products for import and export. HPLC
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SN/T 1628-2005
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PDF similar to SN/T 1628-2024
Basic data | Standard ID | SN/T 1628-2024 (SN/T1628-2024) | | Description (Translated English) | (Determination of closantel residue in exported animal-derived food) | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | X04 | | Classification of International Standard | 67.050 | | Date of Issue | 2024-12-31 | | Date of Implementation | 2025-07-01 | | Issuing agency(ies) | General Administration of Customs | SN/T 1628-2005: Determination of closantel residues in meat and meat products for import and export. HPLC
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Determination of closantel residues in meat and meat products for import and export. HPLC
Book of the People's Republic of China Entry and Exit Inspection and Quarantine
Import and export of meat and meat products
Determination of residual amount by high performance liquid chromatography
Released on.2005-08-18
2006-02-01 implementation
People's Republic
The General Administration of Quality Supervision, Inspection and Quarantine issued
Foreword
Appendix A of this standard is an informative annex.
This standard is proposed and managed by the National Certification and Accreditation Administration.
This standard was drafted. Hebei Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China.
The main drafters of this standard. Wang Fengchi, Ma Zhendong, Ai Lianfeng, Dou Caiyun.
This standard is the first industry standard for entry-exit inspection and quarantine.
Import and export of meat and meat products
Determination of residual amount by high performance liquid chromatography
1 Scope
This standard specifies the HPLC method for the determination of residual cyanoguanidine in meat and meat products.
This standard applies to the determination of residual cyanidinamide in beef and mutton.
2 Determination method
2.1 Method summary
The residue of cyanoimide in the sample is extracted with acetonitrile, purified by liquid distribution in n-hexane-acetonitrile, evaporated to dryness, and made up to volume with acetonitrile.
The photodetector was determined by high performance liquid chromatography and quantified by external standard method.
2.2 Reagents and materials
Unless otherwise specified, the reagents used were of analytical grade and the water was ultrapure water.
2.2.1 Acetonitrile. HPLC grade, saturated with n-hexane.
2.2.2 Methanol.
2.2.3 Triethylamine.
2.2.4 Phosphoric acid. excellent grade.
2.2.5 anhydrous sodium sulfate. 650 ° C burning for 4h, stored in a closed container for use.
2.2.6 n-Hexane. saturated with acetonitrile.
2.2.7 0.45 μm filter.
2.2.8 Cyanurizamide standard. purity ≥ 98.0%.
2.2.9 Standard stock solution. Accurately weigh 10mg (accurate to 0.1mg) cyanurizamide standard, dissolve it with acetonitrile, transfer to 20mL
In a volumetric flask, dilute to the mark with acetonitrile. The concentration of this solution was 0.500 mg/mL, and it was stored at 1 ° C to 4 ° C, and the storage period was 1 year.
2.2.10 Standard intermediate solution. Pipette 1.00mL of standard stock solution and dilute to a 50 mL volumetric flask with acetonitrile. Concentration is
10.0 μg/mL, stored at 1 ° C ~ 4 ° C, the shelf life is 3 months.
2.2.11 Standard working fluid. According to the need, draw a certain amount of standard intermediate liquid, dilute to standard working solution with acetonitrile, and use it now.
2.3 Instruments and equipment
2.3.1 High Performance Liquid Chromatograph. equipped with a fluorescence detector.
2.3.2 Ultrasonic cleaner.
2.3.3 Rotate the evaporator.
2.3.4 Nitrogen blowing instrument.
2.3.5 Acidity meter.
2.4 Determination steps
2.4.1 Extraction
Weigh 5g (accurate to 0.01g) ground and mixed laboratory samples in 100mL stoppered Erlenmeyer flask, add 50.0mL
Saturated n-hexane in acetonitrile and about 10 g of anhydrous sodium sulfate. After closing the plug, shake it vigorously to spread the sample, then in the ultrasonic cleaner
Ultrasonic extraction was performed for 10 min. The extract was filtered through a filter paper into a 150 mL separatory funnel.
2.4.2 Purification
Add 40 mL of saturated acetonitrile in n-hexane to the separatory funnel containing the filtrate, cover the stopper, gently shake a few times, then deflate, then vortex.
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