SN/T 1628-2024 English PDFSN/T 1628: Historical versions
Basic dataStandard 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---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 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 ForewordAppendix 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 chromatography1 ScopeThis 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 method2.1 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. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of SN/T 1628-2024_English be delivered?Answer: Upon your order, we will start to translate SN/T 1628-2024_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of SN/T 1628-2024_English with my colleagues?Answer: Yes. The purchased PDF of SN/T 1628-2024_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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