SN/T 1780-2024 English PDFSN/T 1780: Historical versions
Basic dataStandard ID: SN/T 1780-2024 (SN/T1780-2024)Description (Translated English): (Determination of tert-chlorobutanol 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 1780-2006: Determination of chloroblltarlolum in cosmetics for import and export. Gas 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 chloroblltarlolum in cosmetics for import and export.Gas chromatography method Book of the People's Republic of China Entry and Exit Inspection and Quarantine Determination of chlorobutanol in imported and exported cosmetics Gas 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, Sun Haifeng, Cai Tianpei, Zhang Qing, Yu Wenlian. This standard is the first industry standard for entry-exit inspection and quarantine. Determination of chlorobutanol in imported and exported cosmetics Gas chromatography1 ScopeThis standard specifies the gas chromatographic method for the determination of chlorobutanol in cosmetics. This standard applies to the determination of chlorobutanol in cosmetics.2 PrincipleTrichloroethanol was added to the cosmetic sample as an internal standard, and extracted with absolute ethanol. The extract was filtered and determined by gas chromatography. Qualitative according to its retention time, the internal standard method is quantitative.3 reagents and materialsThe reagents used were of analytical grade unless otherwise stated. 3.1 Anhydrous ethanol. excellent grade pure. 3.2 Chlorobutanol. purity ≥ 98%. 3.3 Internal standard. trichloroethanol, purity ≥ 98%. 3.4 Chlorobutanol standard stock solution. accurately weigh the appropriate amount of chlorobutanol standard (accurate to 0.1mg), dissolve it in absolute ethanol, make up, mix, Formulated to a standard stock solution at a concentration of 100 μg/mL. The standard working solution is diluted to the appropriate concentration with ethanol as needed. 3.5 Internal standard stock solution. accurately weigh the appropriate amount of trichloroethanol standard (accurate to 0.1mg), dissolve in absolute ethanol, make up, mix, and prepare An internal standard stock solution was added at a concentration of 25 μg/mL. 3.6 Filter paper.4 instruments4.1 Gas chromatograph with an electronic capture detector. 4.2 Ultrasonic cleaner.5 Determination steps5.1 Sample processing Weigh about 0.5g (accurate to 1mg) of the cosmetic sample, add 3mL (3.5) of the internal standard in a 50mL stoppered flask, and add 15mL absolute ethanol, ultrasonic extraction for 20min, the extract was filtered into a 25mL volumetric flask with a funnel, and the volume was adjusted to the mark with anhydrous ethanol. uniform. The filtrate was used for gas chromatography. 5.2 Determination 5.2.1 Chromatographic conditions 5.2.1.1 Column. DB-1701 column 30m × 250μm (inside diameter), film thickness 0.25μm, or equivalent; 5.2.1.2 Column temperature. 70 ° C 5 ° C / → Min 150 ° C 10 ° C / → Min 200 ° C (5 min); 5.2.1.3 carrier gas. nitrogen, purity is 99.999%; 5.2.1.4 Flow rate. 1.0mL/min; 5.2.1.5 inlet temperature. 250 ° C; 5.2.1.6 detector temperature. 250 ° C; ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of SN/T 1780-2024_English be delivered?Answer: Upon your order, we will start to translate SN/T 1780-2024_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 1780-2024_English with my colleagues?Answer: Yes. 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