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GB/T 40970-2021: Determination of ammonia in cosmetics - Titration method
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| GB/T 40970-2021 | English | 139 |
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Determination of ammonia in cosmetics - Titration method
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GB/T 40970-2021
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Basic data | Standard ID | GB/T 40970-2021 (GB/T40970-2021) | | Description (Translated English) | Determination of ammonia in cosmetics - Titration method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Y42 | | Word Count Estimation | 7,787 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 40970-2021: Determination of ammonia in cosmetics - Titration 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 ammonia in cosmetics - Titration method
ICS 71.100.70
CCSY42
National Standards of People's Republic of China
Determination of ammonia content in cosmetics by titration
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. 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. Wang Dinglin, Ma Yuelong, Xue Feng, Yang Jian, Zhang Yiping, Zhong Lin, Wu Xin, Zhang Huayan, Peng Yafeng, Gu Yuxiang, Yang Bin.
Determination of ammonia content in cosmetics by titration
1 Scope
This document describes the principles, reagents and materials, equipment, test procedures, test data processing, and methods for determining ammonia content in cosmetics.
Recovery rate, precision, etc.
This document is applicable to the determination of ammonia content added in the form of ammonia gas or ammonia in cosmetics such as hair dye products and perm products.
This document does not apply to products added with ammonium raw materials (except cetrimonium chloride and stearyl trimethyl ammonium chloride).
The detection limit of ammonia (calculated as NH3) in this document is 0.1%, and the limit of quantification is 0.2%.
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
Preparation of preparations and products used in GB/T 603 chemical reagent test method
3 Terms and definitions
There are no terms and definitions that need to be defined in this document.
4 Principle
After the sample is treated with barium chloride, it is extracted with methanol, filtered or centrifuged, and the filtrate (or supernatant) is heated and distilled under alkaline conditions and evaporated
The ammonia is collected in the boric acid absorption solution and titrated with a standard hydrochloric acid titration solution.
5 Reagents and materials
Unless otherwise specified, only use analytical reagents.
5.1 Ammonia-free water is prepared in accordance with GB/T 603.
5.2 Methanol.
5.3 Barium chloride solution (25g/100mL). Weigh 25g of barium chloride, add water to dissolve and dilute to 100mL.
5.4 Magnesium oxide.
5.5 Boric acid solution (20g/L). Weigh 20g of boric acid, add water to dissolve and dilute to 1000mL.
5.6 Hydrochloric acid standard titration solution (0.1mol/L). prepared and calibrated in accordance with GB/T 601, or commercially available reagents can be purchased.
5.7 Methyl red ethanol solution (1g/L). Weigh 0.1g of methyl red, dissolve it in 95% ethanol, dilute with 95% ethanol to 100mL, at room temperature
save.
5.8 Bromocresol green ethanol solution (1g/L). Weigh 0.1g of bromocresol green, dissolve it in 95% ethanol, dilute with 95% ethanol to 100mL,
Keep warm.
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