SN/T 1785-2024 English PDFSN/T 1785: Historical versions
Basic dataStandard ID: SN/T 1785-2024 (SN/T1785-2024)Description (Translated English): (Determination of propyl gallate in imported and exported cosmetics) Sector / Industry: Commodity Inspection Standard (Recommended) Classification of Chinese Standard: Y42 Classification of International Standard: 71.100.70 Date of Issue: 2024-12-16 Date of Implementation: 2025-06-01 Issuing agency(ies): General Administration of Customs SN/T 1785-2006: Determination of gallic acid propy1 ester in cosmetics for import and export. Liquid chromatography 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 gallic acid propy1 ester in cosmetics for import and export.Liquid chromatography method People's Republic of China Entry-Exit Inspection and Quarantine Industry Standard Determination of propyl gallate in imported and exported cosmetics Liquid chromatography Released on.2006-04-25 Implementation of.2006-11-15 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 by the China Academy of Inspection and Quarantine. The main drafters of this standard. Bai Hua, Ding Yan, Hao Nan, Chen Huiming, Lu Jiawen. This standard is the first industry standard for entry-exit inspection and quarantine. Determination of propyl gallate in imported and exported cosmetics Liquid chromatography1 ScopeThis standard specifies the liquid chromatographic method for the determination of propyl gallate in cleansing and skin care cosmetics. This standard applies to the determination of propyl gallate in cleansing and skin care cosmetics.2 PrincipleThe propyl gallate in the cosmetic was extracted with methanol, and the extract was centrifuged, and then measured by high performance liquid chromatography. According to its The retention time is qualitative and the external standard method is used for quantification.3 reagents and materialsUnless otherwise stated, the reagents used were of analytical grade and the water was either secondary deionized water or double distilled water. 3.1 Methanol. chromatographically pure. 3.2 Propionate gallate. purity ≥ 99%. 3.3 standard stock solution of propyl gallate. accurately weigh the appropriate amount of propyl gallate (accurate to 0.1mg), the concentration of methanol is 1000 μg/mL standard stock solution. Dilute to a standard working solution of the appropriate concentration with methanol as needed.4 instruments4.1 Liquid chromatograph. equipped with a UV detector. 4.2 Microsampler. 10 μL. 4.3 Ultrasonic cleaner. 4.4 Centrifuge. 4.5 0.45 μm organic filter.5 Determination steps5.1 Sample processing Weigh about 0.5g (accurate to 1mg) of the cosmetic sample, add 15mL of methanol to the 50mL stoppered flask, and wash it by ultrasonic Ultrasonic extraction in the device for 20 min, the extract was transferred to a 25 mL volumetric flask, diluted to the mark with methanol, and mixed. Take a part of the solution and put it into the centrifuge In the tube, the mixture was centrifuged at 10,000 r/min for 10 min, and the supernatant after centrifugation was filtered through a filter, and the filtrate was subjected to liquid chromatography. 5.2 Determination 5.2.1 Chromatographic conditions 5.2.1.1 Column. C18 column, 250mm × 4.6mm (inside diameter), 5μm (particle size), or equivalent; 5.2.1.2 Mobile phase. methanol + 0.2% aqueous acetic acid (65 + 35); 5.2.1.3 Flow rate. 1.0mL/min; 5.2.1.4 Detection wavelength. 280 nm; 5.2.1.5 Column temperature. room temperature; 5.2.1.6 Injection volume. 10 μL; ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of SN/T 1785-2024_English be delivered?Answer: Upon your order, we will start to translate SN/T 1785-2024_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 1785-2024_English with my colleagues?Answer: Yes. The purchased PDF of SN/T 1785-2024_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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