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GB/T 39689-2020: Surface active agents - Determination of free formaldehyde
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 39689-2020 | English | 169 |
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Surface active agents - Determination of free formaldehyde
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GB/T 39689-2020
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Basic data | Standard ID | GB/T 39689-2020 (GB/T39689-2020) | | Description (Translated English) | Surface active agents - Determination of free formaldehyde | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G72 | | Classification of International Standard | 71.100.40 | | Word Count Estimation | 9,954 | | Date of Issue | 2020-12-14 | | Date of Implementation | 2021-07-01 | | Quoted Standard | GB/T 601; GB/T 6372; GB/T 6682-2008 | | Regulation (derived from) | National Standard Announcement No. 28 of 2020 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | | Summary | This standard specifies the principles and requirements for the determination of free formaldehyde content in surfactants, and specifies the standard chromatograms given by spectrophotometer and liquid chromatography. This standard applies to the determination of free formaldehyde content in surfactants. | GB/T 39689-2020: Surface active agents - Determination of free formaldehyde---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.
(Surfactant Determination of free formaldehyde content)
ICS 71:100:40
G72
National Standards of People's Republic of China
Determination of Free Formaldehyde Content in Surfactants
2020-12-14 release
2021-07-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Foreword
This standard was drafted in accordance with the rules given in GB/T 1:1-2009:
This standard was proposed by the China Petroleum and Chemical Industry Federation:
This standard is under the jurisdiction of the National Chemical Standardization Technical Committee (SAC/TC63):
Drafting organizations of this standard: Zhejiang Wulong New Materials Co:, Ltd:, Liaoning Aoke Chemical Co:, Ltd:, Jiangyin Jiuniu Technology Co:, Ltd:
Company, Zhejiang Real Madrid New Material Technology Co:, Ltd:, Zhejiang Lvkean Chemical Co:, Ltd:
The main drafters of this standard: Ding Jiying, Li Xiaofei, Dong Zhenpeng, Liu Weiqin, Wu Bingmou, Shen Chunyan, Yu Pei, Ma Haofeng, Gao Hongjun, Liu Jia,
Ma Jianxin, Liu Baisong:
Determination of Free Formaldehyde Content in Surfactants
1 Scope
This standard determines the principles and requirements for the determination of free formaldehyde content in surfactants, and specifies the spectrophotometric method and liquid chromatography
The standard chromatogram given by the method:
This standard applies to the determination of free formaldehyde content in surfactants:
2 Normative references
The following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article
Pieces: For undated references, the latest version (including all amendments) applies to this document:
GB/T 601 Preparation of Standard Titration Solution for Chemical Reagents
GB/T 6372 Surface active agent and detergent sample dividing method
GB/T 6682-2008 Analysis laboratory water specifications and test methods
3 Principle
The free formaldehyde in the sample is evaporated by distillation, and after the color is developed with a color developer, it is determined by a spectrophotometer or liquid chromatography:
Formaldehyde content:
4 Preparation of formaldehyde standard solution
4:1 General
In the analysis test, only reagents that have been confirmed to be analytically pure are used, and the water used meets the requirements of Grade 3 water in GB/T 6682-2008: Used
Unless otherwise specified, the solution should be prepared according to the requirements in GB/T 601:
4:2 Iodine solution
c(1/2I2)=0:1mol/L aqueous solution:
4:3 Sodium hydroxide solution
The concentration is 1mol/L:
4:4 Hydrochloric acid solution
The concentration is 1mol/L:
4:5 Sodium thiosulfate standard solution
The concentration is 0:1mol/L, and it is calibrated in accordance with GB/T 601:
4:6 Starch solution
The concentration is 1g/100mL, weigh 1g starch, use a small amount of water to make a paste, pour it into 100mL boiling water, it is a transparent solution, when it is used
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