GB/T 37363.3-2020 English PDF

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GB/T 37363.3-2020: Determination of biocides content of coating materials - Part 3: Determination of triclosan content
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 37363.3-2020	169	Add to Cart	3 days	Determination of biocides content of coating materials - Part 3: Determination of triclosan content	Valid

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GB/T 37362.1   GB/T 37356   GB/T 37363.2   GB/T 37363.4   GB/T 37361   GB/T 37363.1   

Basic data

Standard ID: GB/T 37363.3-2020 (GB/T37363.3-2020)
Description (Translated English): Determination of biocides content of coating materials - Part 3: Determination of triclosan content
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G50
Classification of International Standard: 87.040
Word Count Estimation: 9,971
Date of Issue: 2020-11-19
Date of Implementation: 2021-10-01
Regulation (derived from): National Standard Announcement No. 26 of 2020
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 37363.3-2020: Determination of biocides content of coating materials - Part 3: Determination of triclosan content

---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 biocides content of coating materials-Part 3.Determination of triclosan content ICS 87.040 G50 National Standards of People's Republic of China Determination of Biocide Content in Coatings Part 3.Determination of Triclosan Content 2020-11-19 released 2021-10-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Foreword

GB/T 37363 "Determination of Biocide Content in Coatings" is divided into the following parts. ---Part 1.Determination of isothiazolinone content; ---Part 2.Determination of Diuron content; ---Part 3.Determination of triclosan content; ---Part 4.Determination of carbendazim content; This part is Part 3 of GB/T 37363. This section was drafted in accordance with the rules given in GB/T 1.1-2009. This part was proposed by the China Petroleum and Chemical Industry Federation. This part is under the jurisdiction of the National Paint and Pigment Standardization Technical Committee (SAC/TC5). Drafting organizations of this section. CNOOC Changzhou Coating Chemical Research Institute Co., Ltd., Changzhou Guanghui New Materials Research Institute Co., Ltd., Sankeshu Coating Co., Ltd., Shenzhen Guangtian High-tech New Material Co., Ltd., Qingdao Xingguo Coating Co., Ltd., Qingdao Vocational and Technical College. The main drafters of this section. Li Guangdong, Li Jinying, Zhao Shaohong, Cai Xuena, Chen Xiaobo, Xu Xinxiang, Liu Bochen, Zhao Meifa, Liang Lihua, Ni Weiliang. Determination of Biocide Content in Coatings Part 3.Determination of Triclosan Content Warning---The personnel using this section should have practical experience in formal laboratory work. This section does not point out all possible safety issues question. The user is responsible for taking appropriate safety and health measures and ensuring compliance with the conditions stipulated by relevant national laws and regulations.

1 Scope

This part of GB/T 37363 specifies the use of liquid chromatography and liquid chromatography-mass spectrometry/mass spectrometry to determine triclosan in paints. (2,4,4'-Trichloro-2'-hydroxydiphenyl ether, CASNo.. 3380-34-5) Principle of content, reagents and materials, equipment, samples, test steps Steps, test data processing, detection limit, precision and test report. This section applies to the determination of triclosan content in coatings. The determination of triclosan content in coating film and coating materials can also refer to this section.

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 document. For undated references, the latest version (including all amendments) applies to this document. GB/T 3186 Sampling of paints, varnishes and raw materials for paints and varnishes GB/T 6682-2008 Analysis laboratory water specifications and test methods GB/T 12806-2011 Laboratory glassware single mark volumetric flask GB/T 12807-1991 Laboratory glass measuring pipette GB/T 12808-2015 Laboratory glass instrument single mark pipette

3 Principle

Liquid chromatography. Use methanol as the extraction solvent to extract triclosan in the sample by a combination of ultrasonic extraction and centrifugal separation, and use liquid Liquid chromatography (LC) is used for detection, qualitatively by retention time and quantified by external standard method. Liquid chromatography-mass spectrometry/mass spectrometry. use methanol as the extraction solvent, and use a combination of ultrasonic extraction and centrifugal separation to extract the sample The triclosan was detected by liquid chromatography-mass spectrometry/mass spectrometry (LC-MS/MS), qualitatively by retention time and selected ion, and quantified by external standard method. Note 1.Other confirmed suitable solvents can also be selected as extraction solvents. Note 2.Liquid chromatography in this section includes high performance liquid chromatography, ultra high performance liquid chromatography, etc.

4 Reagents and materials

Unless otherwise specified, only reagents of analytical purity and above are used in the analysis. 4.1 Triclosan. The mass fraction is not less than 98%, or the purity is known. 4.2 Methanol. chromatographically pure. 4.3 Ammonium acetate. chromatographically pure. 4.4 Standard stock solution. about.200μg/mL, weigh about 0.02g of triclosan (4.1), accurate to 0.1mg, and place it in a 100mL volumetric flask (5.6), dilute to the mark with methanol (4.2). The standard stock solution is stored under 4℃ and protected from light, and the validity period is 30d. ......

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