GB/T 33308-2016 English PDF

US$199.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 33308-2016: Determination of free methanol in cosmetics -- Gas chromatography
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 33308-2016	199	Add to Cart	3 days	Determination of free methanol in cosmetics -- Gas chromatography	Valid

Similar standards

GB/T 35801   GB/T 35803   GB/T 35800   GB/T 33307   GB/T 33306   

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. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 33308-2016_English be delivered?

Answer: Upon your order, we will start to translate GB/T 33308-2016_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 GB/T 33308-2016_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 33308-2016_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. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.