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GB/T 33308-2016: Determination of free methanol in cosmetics -- Gas chromatography
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 33308-2016 | English | 199 |
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Determination of free methanol in cosmetics -- Gas chromatography
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GB/T 33308-2016
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Basic data | Standard ID | GB/T 33308-2016 (GB/T33308-2016) | | Description (Translated English) | Determination of free methanol in cosmetics -- Gas chromatography | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Y42 | | Classification of International Standard | 71.100.70 | | Word Count Estimation | 10,141 | | Date of Issue | 2016-12-13 | | Date of Implementation | 2017-07-01 | | Regulation (derived from) | National Standard Notice No.263 of 2016 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | GB/T 33308-2016: Determination of free methanol in cosmetics -- Gas 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 free methanol in cosmetics - Gas chromatography
ICS 71.100.70
Y42
National Standards of People's Republic of China
Determination of free methanol in cosmetics - Gas chromatographic method
2016-12-13 released
2017-07-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Management Committee released
Foreword
This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This standard is proposed by the China Light Industry Federation.
This standard by the National Spice Fragrance Cosmetics Standardization Technical Committee (SAC/TC257) centralized.
The drafting of this standard. China Institute of Inspection and Quarantine, Shanghai Daily Chemical Industry Research Institute.
The main drafters of this standard. Li Jingrui, Guo Xiangyu, Ma Qiang, Zhang Qing, Bai Hua, Li Wentao, Wang Chao
Determination of free methanol in cosmetics - Gas chromatographic method
1 Scope
This standard specifies the method for the determination of free methanol in cosmetics by gas chromatography.
This standard applies to the cream, water, shampoo, hair gel cosmetics in the determination of free methanol.
The detection limit of methanol for this standard is 6.0mg/kg, the limit of quantification is 20.0mg/kg.
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
GB/T 6682 Analytical laboratory water specifications and test methods
3 principle
After pretreatment (direct dilution or water bath distillation), the samples were determined by gas chromatography, quantified by external standard method, gas chromatography-mass spectrometry
confirm.
4 reagents and materials
Unless otherwise stated, the reagents used are analytical grade and water is the experimental water specified in GB/T 6682.
4.1 Ethanol. Chromatographic pure, confirmed before use without methanol.
4.2 Sodium chloride.
4.3 ethanol [φ (C2H5OH) = 75%]. ethanol (4.1) 75mL, diluted with water to 100mL.
4.4 methanol standards.
4.5 methanol standard stock solution. take appropriate amount of methanol standard (4.4) (accurate to 0.0001g), with 75% ethanol (4.3) prepared with methanol
10g/L of the standard stock solution. Is now available.
4.6 Methanol Standard Working Solution. The methanol standard stock solution (4.5) was formulated with 75% ethanol (4.3) at a concentration of 0.002 g/L, 0.005 g/L,
0.01 g/L, 0.02 g/L, 0.05 g/L, 0.10 g/L, 0.20 g/L methanol standard working solution. Is now available.
4.7 Defoamer. emulsified silicone oil.
5 instruments and equipment
5.1 Gas Chromatography (GC) instrument. with a hydrogen flame ionization detector (FID).
5.2 Gas Chromatography-Mass Spectrometry (GC-MS) instrument. equipped with electron impact ion source (EI).
5.3 Analysis of the balance. the sense of 0.0001g and 0.001g.
5.4 full-mouth water bath distillation device.
5.5 constant temperature water bath. temperature range 25 ℃ ~ 100 ℃, temperature control accuracy ± 0.5 ℃.
5.6 syringe. 5 μL, 10 μL, 1 mL.
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