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GB/T 40897-2021 English PDF

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US$179.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 40897-2021: Determination of alkali sulfides and alkaline earth sulfides in cosmetics - Methylene blue spectrophotometric method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 40897-2021	179	Add to Cart	3 days	Determination of alkali sulfides and alkaline earth sulfides in cosmetics - Methylene blue spectrophotometric method	Valid

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Basic data

Standard ID: GB/T 40897-2021 (GB/T40897-2021)
Description (Translated English): Determination of alkali sulfides and alkaline earth sulfides in cosmetics - Methylene blue spectrophotometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Y42
Word Count Estimation: 9,929
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 40897-2021: Determination of alkali sulfides and alkaline earth sulfides in cosmetics - Methylene blue spectrophotometric 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 alkali sulfides and alkaline earth sulfides in cosmetics - Methylene blue spectrophotometric method ICS 71.100.70 CCSY42 National Standards of People's Republic of China Alkali metal sulfides and alkaline earth metals in cosmetics Determination of sulfide-Methylene blue spectrophotometric method Released on 2021-11-26 2022-06-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. Please note that some of the contents of this document may involve patents, and the issuing agency of this document is not responsible for identifying patents. This document was proposed by the Federation of Light Industry. This document is under the jurisdiction of the National Standardization Technical Committee for Fragrance, Flavor and Cosmetics (SAC/TC257). Drafting organizations of this document. Shanghai Institute of Quality Supervision and Inspection Technology, Shanghai Institute of Perfume. The main drafters of this document. Lin Lin, Xue Feng, Wang Ying, Xing Chaohong, Ma Yuelong, Gu Yuxiang, Peng Yafeng, Yang Bin.

Introduction

This document only provides methods to detect the total amount of sulfur in alkali metal sulfides and alkaline earth metal sulfides in cosmetics. Because these two types of sulfides There are many varieties, and they have different limits in cosmetics. When the test results are obtained according to this document, it is necessary to comprehensively consider the makeup to determine whether it exceeds the standard. The ingredients indicated on the product label and the raw material sampling records provided by the cosmetics manufacturer shall be determined. Alkali metal sulfides and alkaline earth metals in cosmetics Determination of sulfide-Methylene blue spectrophotometric method

1 Scope

This document describes the principles and tests of the methylene blue spectrophotometric method for the determination of alkali metal sulfides and alkaline earth metal sulfides in cosmetics. Reagents and materials, equipment, test procedures, test data processing, recovery rate, precision, etc. This document is applicable to the determination of alkali metal sulfide and alkaline earth metal sulfide content in hair removal cosmetics such as lotions, creams and emulsions. In this document, the detection limit of alkali metal sulfide and alkaline earth metal sulfide (in terms of sulfur) is 3mg/kg, and the limit of quantification is 10mg/kg.

2 Normative references

The content of the following documents constitutes an indispensable clause of this document through normative references in the text. Among them, dated quotations Only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. GB/T 601 Preparation of Standard Titration Solution for Chemical Reagents GB/T 6682 Analytical laboratory water specifications and test methods

3 Terms and definitions

There are no terms and definitions that need to be defined in this document.

4 Principle

In an acid medium, alkali metal sulfides and alkaline earth metal sulfides generate hydrogen sulfide gas, and the hydrogen sulfide is taken out with a nitrogen stream to generate Sulfide ion reacts with N,N-dimethyl-p-phenylenediamine in an acidic solution in the presence of ferric ion to form methylene blue, which is determined at a wavelength of 665nm

5 Reagents and materials

Unless otherwise specified, only use analytical reagents. 5.1 Water, GB/T 6682, level three. 5.2 Sulfuric acid. ρ(H2SO4)=1.84g/mL. 5.3 Hydrochloric acid. ρ(HCl)=1.19g/mL, excellent grade pure. 5.4 Sodium hydroxide. 5.5 N,N-Dimethyl-p-phenylenediamine hydrochloride [NH2C6H4N(CH3)2·2HCl]. 5.6 Ferric ammonium sulfate [Fe(NH4)(SO4)2·12H2O]. 5.7 Soluble starch. 5.8 Zinc acetate [Zn(CH3COO)2·2H2O]. 5.9 Iodine. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 40897-2021_English be delivered?

Answer: Upon your order, we will start to translate GB/T 40897-2021_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 40897-2021_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 40897-2021_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.