SN/T 2103-2008 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 2103-2008	239	Add to Cart	3 days	Determination of 8-methoxypsoralen and 5-methoxypsoralen in cosmetics for import and export. Liquid chromatography	Obsolete

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Basic data

Standard ID: SN/T 2103-2008 (SN/T2103-2008)
Description (Translated English): Determination of 8-methoxypsoralen and 5-methoxypsoralen in cosmetics for import and export. Liquid chromatography
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: Y42
Word Count Estimation: 6,693
Date of Issue: 2008-07-17
Date of Implementation: 2009-02-01
Regulation (derived from): Industry standard filing Notice 2008 No. 9
Issuing agency(ies): General Administration of Customs
Summary: This standard specifies the import and export of cosmetics, 8 methoxypsoralen and 5 methoxypsoralen liquid chromatographic method. This standard applies to skin care category, skin cleansing category, skin care/cosmetics import and export modified class, 8 methoxypsoralen and 5 methoxypsoralen determination.

SN/T 2103-2008: Determination of 8-methoxypsoralen and 5-methoxypsoralen in cosmetics for import and export. Liquid chromatography

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Determination of 8-methoxypsoralen and 5-methoxypsoralen in cosmetics for import and export.Liquid chromatography Exit inspection and quarantine industry standard book People's Republic of China Importers cosmetics 8-methoxy psoralen and 5-methoxy-psoralen measuring liquid chromatography Posted 2008-07-17 2009-02-01 implementation People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine released

Foreword

Appendix A of this standard is an informative annex. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. The standard by the China Academy of Inspection and Quarantine is responsible for drafting. The main drafters of this standard. Cheng Yan, Wang Xing, Xiao Haiqing, Caitian Pei, Sun Haifeng, Liu Liu, Wang Chao. This standard is the first release of the entry-exit inspection and quarantine industry standards. Importers cosmetics 8-methoxy psoralen and 5-methoxy-psoralen measuring liquid chromatography

1 Scope

This standard specifies the import and export cosmetics 8-methoxy psoralen and liquid chromatography method of 5-methoxy-psoralen. This standard applies to skin care category, skin cleaning category, skin care/cosmetics import and export modified class 8-methoxy psoralen and 5-methoxy-psoralen determination. Principle 2 Cosmetics 8-methoxy-5-methoxy-psoralen and psoralen with methanol ultrasonic extraction, filtration, reverse-phase HPLC Chromatographic separation technique to measure. According to their retention time qualitative, external standard.

3 Reagents and materials

Unless otherwise indicated, the reagents used were of analytical grade and water as secondary deionized water. 3.1 Methanol, HPLC grade. 3.2 8-methoxy psoralen, purity ≥99%. 3.3 5-methoxy-psoralen, purity ≥99%. 3.4 8-methoxy-5-methoxy-psoralen and psoralen stock standard solution (500mg/L). Weigh accurately respectively 8-methoxypsoralen Su (3.2) and 5-methoxy-psoralen (3.3) 0.05g, accurate to 0.0001g, with methanol to 100mL, preserve refrigerator. Diluted to concentrations applicable standard working solution as needed with methanol.

4 Instrument

4.1 liquid chromatograph equipped with a diode array detector. 4.2 micro-injector, 10μL. 4.3 ultrasonic cleaner. 4.4 Centrifuge, greater than 6000r/min. 4.5 and 0.45μm organic solvent filter filtration membranes.

5 measuring step

5.1 Sample Processing Weigh the sample cosmetics 0.5g, accurate to 0.001g, added methanol (3.1) in an ultrasonic cleaner ultrasonic vibration 20min, with armor Alcohol volume to 25mL, and mix. A portion of the solution into a centrifuge tube at 6000r/min centrifugal 20min, after centrifugation in the centrifuge Clear liquid organic 0.45μm membrane filter, the filtrate to be measured by. 5.2 Determination of the sample 5.2.1 Chromatographic conditions 5.2.1.1 Column. UG120C18 column [250mm × 4.5mm (inner diameter), 5μm, or equivalent person]. 5.2.1.2 Mobile phase. methanol + water (58 + 42, volume ratio). 5.2.1.3 flow rate. 1.0mL/min. 5.2.1.4 The detection wavelength. 301nm. ......