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GB/T 36899-2018: Fluorescent whitening agents -- Determination of yellow spots
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| GB/T 36899-2018 | English | 119 |
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Fluorescent whitening agents -- Determination of yellow spots
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GB/T 36899-2018
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Basic data | Standard ID | GB/T 36899-2018 (GB/T36899-2018) | | Description (Translated English) | Fluorescent whitening agents -- Determination of yellow spots | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G55 | | Classification of International Standard | 71.100.01;87.060.10 | | Word Count Estimation | 6,652 | | Date of Issue | 2018-12-28 | | Date of Implementation | 2019-11-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 36899-2018: Fluorescent whitening agents -- Determination of yellow spots---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.
Fluorescent whitening agents--Determination of yellow spots
ICS 71.100.01; 87.060.10
G55
National Standards of People's Republic of China
Determination of yellowing point of fluorescent whitening agent
Published on.2018-12-28
2019-11-01 implementation
State market supervision and administration
China National Standardization Administration issued
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 Dyestuff Standardization Technical Committee (SAC/TC134).
This standard was drafted. Zhejiang Chuanhua Huayang Chemical Co., Ltd., Guangdong Demei Fine Chemical Group Co., Ltd., China Chemical Industry
Ji Technology Development Center, Shenyang Chemical Research Institute Co., Ltd., National Dyestuff Quality Supervision and Inspection Center.
The main drafters of this standard. Dong Zhongsheng, Song Yanru, Chen Zufen, Xue Yan, Ma Junqing, Zhu Yeqing, Zhao Fabao, Wang Yong.
Determination of yellowing point of fluorescent whitening agent
1 Scope
This standard specifies the method for determining the yellowing point of fluorescent whitening agents.
This standard is applicable to the determination of yellowing point of fluorescent whitening agent for cotton, nylon and paper.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 2374-2017 General conditions for the determination of dyes
GB/T 9338-2008 Determination of relative whiteness of fluorescent whitening agents (ISO 105-J02..1997, MOD)
3 Principle
Fluorescent whitening agent dyes the substrate (cotton, nylon, paper) at a certain depth, when the fluorescent whitening agent reaches a certain depth
After the value, the whiteness value of the matrix no longer increases with the increase of the dyeing depth, and the dyeing depth of the fluorescent whitening agent corresponding to the highest whiteness value is
Yellowing point.
4 reagents and materials
Reagents and materials should comply with the relevant provisions of Chapter 3 of GB/T 2374-2017.
5 instruments and equipment
Instruments and equipment shall comply with the relevant provisions of Chapter 4 of GB/T 2374-2017.
5.1 Whiteness meter. Meet the requirements of GB/T 9338-2008.
5.2 Analytical balance. Sensitivity 0.0001g.
6 Test methods
6.1 General conditions for dyeing
General conditions for dyeing should comply with the relevant provisions of GB/T 2374-2017.
6.2 Dyeing depth
According to the fluorescent whitening agent, the dyeing (whitening) method is different for different substrates, and the dyeing depth has the following two representations.
a) Dip dyeing depth is expressed in % (owf);
b) Dyeing dyeing depth is expressed in g/L.
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