GB/T 41456-2022 English PDF

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GB/T 41456-2022: Nanotechnologies - Determination of the concentration of nanometer titanium dioxide airborne dust in workplace - Spectrophotometry method
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Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 41456-2022	329	Add to Cart	4 days	Nanotechnologies - Determination of the concentration of nanometer titanium dioxide airborne dust in workplace - Spectrophotometry method	Valid

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Basic data

Standard ID: GB/T 41456-2022 (GB/T41456-2022)
Description (Translated English): Nanotechnologies - Determination of the concentration of nanometer titanium dioxide airborne dust in workplace - Spectrophotometry method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G30
Word Count Estimation: 16,128
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 41456-2022: Nanotechnologies - Determination of the concentration of nanometer titanium dioxide airborne dust in workplace - Spectrophotometry method

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Nanotechnologies -- Determination of the concentration of nanometer titanium dioxide airborne dust in workplace -- Spectrophotometry method ICS 71.040.50 CCSG30 National Standards of People's Republic of China Nanotechnology Production Environment Nano Titanium Dioxide Dust Concentration detection method Spectrophotometry Published on 2022-04-15 2022-11-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4.Principle of measurement method 1 5 Equipment and Instruments 2 6 Sample collection and processing 2 7 Test of titanium dioxide dust concentration in dispersion 2 8 results 5 9 Test report 6 Appendix A (Informative) Test Example of Nano Titanium Dioxide Dust Concentration in Dispersion (Lower Concentration) 7 Appendix B (Informative) Test Example of Nano Titanium Dioxide Dust Concentration in Dispersion (Higher Concentration) 10 Reference 12

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" drafted. Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by the Chinese Academy of Sciences. This document is under the jurisdiction of the National Nanotechnology Standardization Technical Committee (SAC/TC279). This document was drafted by. Nanjing University of Science and Technology, Beijing Coast Hongmeng Standard Material Technology Co., Ltd., Jiangsu Particle Society, Beijing Municipal Physical and Chemical Analysis and Testing Center, China Institute of Metrology, Beijing Powder Technology Association. The main drafters of this document. Yang Yi, Wang Zhengping, Chen Shouwen, Zhang Jinhua, Li Qinmei, Zhang Wenge, Gao Xia, Gao Xia, Liu Weili, Mao Ping, Li Li, Dou Xiaoliang, Wang Huan, Yan Yanlin, Chen Jiuyu. Nanotechnology Production Environment Nano Titanium Dioxide Dust Concentration detection method Spectrophotometry

1 Scope

This document specifies a spectrophotometric method for the determination of nano-titanium dioxide dust concentrations in production ambient air, including sample collection And processing, testing, data processing, result calculation. This document applies to the use of a spectrophotometer to detect the concentration of nano-titanium dioxide dust collected by wet methods. Other Ambient Air Nano II The determination of titanium oxide concentration can refer to this document.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document. GB/T 30544.4 Nanotechnology Terminology Part 4.Nanostructured Materials JJG880 Turbidimeter JJG956 Atmospheric Sampler

3 Terms and Definitions

The terms and definitions defined in GB/T 30544.4 and the following apply to this document. 3.1 Suspended in air, at least one dimension of titanium dioxide is less than 100 nm. 3.2 collection liquid The liquid medium that captures and retains nano-dust when using an atmospheric sampler for wet collection. 3.3 Capture fluid containing nano-dust. Note. referred to as dispersion.

4 Principle of the measurement method

Using an atmospheric sampler, the nano-TiO2 dust in the air was collected into the capture liquid to form a titanium dioxide dust dispersion. Dioxide Titanium oxysulfate (see chemical reaction formula 1), the digestion product of titanium, undergoes complexation reaction with diantipyridine methane (DAPM) or hydrogen peroxide (H2O2). In response, complex complexes with significant color are generated (see chemical reaction formula 2 and chemical reaction formula 3, respectively). Use a spectrophotometer to test the complexes in the corresponding The absorbance at the maximum absorption wavelength, the absorbance of the complex is proportional to the concentration of titanium dioxide within a certain range. Combined Air Sample Collector The concentration of titanium dioxide dust in the ambient air was calculated by using parameters such as volume and dispersion volume. ......

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