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SN/T 1498-2004 English PDF

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SN/T 1498-2004: Determination of magnesium L-ascorbyl-2-phosphate in cosmetics. Liquid chromatography
Status: Obsolete
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SN/T 1498-2004English239 Add to Cart 3 days [Need to translate] Determination of magnesium L-ascorbyl-2-phosphate in cosmetics. Liquid chromatography Obsolete SN/T 1498-2004

PDF similar to SN/T 1498-2004


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Basic data

Standard ID SN/T 1498-2004 (SN/T1498-2004)
Description (Translated English) Determination of magnesium L-ascorbyl-2-phosphate in cosmetics. Liquid chromatography
Sector / Industry Commodity Inspection Standard (Recommended)
Classification of Chinese Standard Y42
Classification of International Standard 71.100.70
Word Count Estimation 6,624
Date of Issue 2004-11-17
Date of Implementation 2005-04-01
Regulation (derived from) 2005 Bulletin No. 3 industry standard
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China
Summary This standard specifies the cosmetics magnesium ascorbyl phosphate liquid chromatography detection methods. This standard applies to cosmetics magnesium ascorbyl phosphate is detected.

SN/T 1498-2004: Determination of magnesium L-ascorbyl-2-phosphate in cosmetics. Liquid chromatography


---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 magnesium L-ascorbyl-2-phosphate in cosmetics.Liquid chromatography Book of the People's Republic of China Entry and Exit Inspection and Quarantine Method for detecting magnesium ascorbyl phosphate in cosmetics Liquid chromatography Released on November 11,.2004 2005-04-01 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 by the China Academy of Inspection and Quarantine. The main drafters of this standard. Liu Song, Lin Yuanhui, Sun Haifeng. This standard is the first industry standard for entry-exit inspection and quarantine. Method for detecting magnesium ascorbyl phosphate in cosmetics Liquid chromatography

1 Scope

This standard specifies the liquid chromatographic method for the determination of magnesium ascorbyl phosphate in cosmetics. This standard applies to the detection of magnesium ascorbyl phosphate in cosmetics.

2 Principle

Magnesium ascorbyl phosphate in cosmetics is extracted with water, filtered, and separated and determined by reversed-phase high performance liquid chromatography. root According to its retention time qualitative, the standard working curve method is used for quantification.

3 reagents and materials

Unless otherwise stated, the reagents used were of analytical grade and the water was secondary deionized water. 3.1 Potassium dihydrogen phosphate, 0.005 mol/L. 3.2 Magnesium ascorbyl phosphate, purity ≥ 98%. 3.3 Ascorbyl phosphate magnesium standard stock solution (1g/L). Weigh 0.1g magnesium ascorbyl phosphate, accurate to 0.1mg, in 50mL In the beaker, add appropriate amount of water to dissolve, and quantitatively transfer the solution into a 100 mL volumetric flask, dilute to the mark with water, and mix.

4 instruments

4.1 Liquid chromatograph with UV detector. 4.2 Microsampler, 10 μL. 4.3 Ultrasonic cleaner. 4.4 Centrifuge, 12000r/min. 4.5 Solvent filter and 0.45 μm filter membrane.

5 Determination steps

5.1 Sample processing Weigh about 0.5g of cosmetic sample, accurate to 1mg, in a 50mL plugged conical flask, add 20mL of water, in the ultrasonic cleaner The medium was shaken for 20 min, the solution was transferred to a 50 mL volumetric flask, diluted with water to the mark, and mixed. Take a part of the solution into the centrifuge tube, After centrifugation at 12000 r/min for 10 min in a centrifuge, the supernatant after centrifugation was filtered through a 0.45 μm filter, and the filtrate was used for measurement. 5.2 Determination 5.2.1 Chromatographic conditions 5.2.1.1 Column. ODSC18 column [250 mm × 4.6 mm (inside diameter), 5 μm, or equivalent]. 5.2.1.2 Mobile phase. 0.005 mol/L potassium dihydrogen phosphate. 5.2.1.3 Flow rate. 1.0 mL/min. 5.2.1.4 Detection wavelength. 254 nm. 5.2.1.5 Column temperature. room temperature. 5.2.1.6 Injection volume. 10 μL. 5.2.2 Standard working curve drawing Accurately remove 0.20mL, 0.50mL, 1.00mL, 2.00mL, 3.00mL, 4.00mL of the standard stock solution of magnesium ascorbyl phosphate

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