GB/T 29024.2-2025 English PDFUS$424.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 29024.2-2025: Determination of particle size distribution - Single particle light interaction methods - Part 2: Light scattering liquid-borne particle counter Status: Valid GB/T 29024.2: Historical versions
Basic dataStandard ID: GB/T 29024.2-2025 (GB/T29024.2-2025)Description (Translated English): Determination of particle size distribution - Single particle light interaction methods - Part 2: Light scattering liquid-borne particle counter Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: A28 Classification of International Standard: 19.120 Word Count Estimation: 21,285 Date of Issue: 2025-06-30 Date of Implementation: 2026-01-01 Older Standard (superseded by this standard): GB/T 29024.2-2016 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 29024.2-2025: Determination of particle size distribution - Single particle light interaction methods - Part 2: Light scattering liquid-borne particle counter---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT29024.2-2025 ICS 19.120 CCSA28 National Standard of the People's Republic of China Replaces GB/T 29024.2-2016 Optical measurement method for single particle size analysis Part 2.Light scattering liquid particle counters (ISO 21501-2.2019, IDT) Released on June 30, 2025 Implementation on January 1, 2026 State Administration for Market Regulation The National Standardization Administration issued Table of ContentsPreface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Principle 2 5 Basic Configuration 2 6 Performance Requirements 3 6.1 Particle size setting error 3 6.2 Counting efficiency 3 6.3 Particle size resolution 3 6.4 False Count 3 6.5 Maximum particle number concentration 3 6.6 Sampling flow error 4 6.7 Sampling time error 4 6.8 Sampling volume error 4 6.9 Calibration Interval 4 6.10 Test and calibration reports 4 7 Testing and calibration procedures 4 7.1 Particle size setting 4 7.2 Counting efficiency evaluation 7 7.3 Particle size resolution evaluation 7 7.4 False Count Evaluation 8 7.5 Evaluation of Overlap Losses at Maximum Particle Number Concentration 8 7.6 Sampling flow rate error assessment 8 7.7 Sampling Time Error Evaluation 8 7.8 Sampling Volume Error Assessment 8 Appendix A (Informative) Counting Efficiency 9 Appendix B (Informative) Particle Size Resolution 10 Appendix C (Informative) False Count Rate 11 Appendix D (Informative) Procedure for evaluating uncertainty of measurement results 12 Reference 16 Preface This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is part 2 of GB/T 29024 "Particle size analysis - Optical measurement of single particles". GB/T 29024 has been published. The following sections. --- Part 2.Light scattering liquid particle counter; --- Part 3.Light obstruction method for liquid particle counters; --- Part 4.Clean room light scattering particle counter. This document replaces GB/T 29024.2-2016 "Particle size analysis - Optical measurement of single particles - Part 2.Liquid particle counting" Compared with GB/T 29024.2-2016, in addition to structural adjustments and editorial changes, the main technical changes are as follows. --- Changed the scope (see Chapter 1, Chapter 1 of the.2016 edition); --- Changed the terms and definitions of calibration particles (see 3.1, 3.1 of the.2016 edition); --- Added a chapter on principles (see Chapter 4); --- Added a chapter on basic configuration (see Chapter 5); --- Changed some performance requirements (see Chapter 6, Chapter 3 of the.2016 edition); --- Changed some calibration procedures (see Chapter 7, Chapter 4 of the.2016 edition). This document is equivalent to ISO 21501-2.2019 "Particle size analysis - Optical measurement methods for single particles - Part 2.Light scattering method for liquids" Particle Counter. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed and coordinated by the National Technical Committee for Particle Characterization and Sorting and Screen Standardization (SAC/TC168). This document was drafted by. Hefei Hongmeng Standard Technology Research Institute Co., Ltd., Tianjin Tianhe Analytical Instrument Co., Ltd., Shanghai Metrology and Measurement Co., Ltd. Testing Technology Research Institute, China Machinery Research Institute of Standards and Technology (Beijing) Co., Ltd., Wenling Luogang Machinery Co., Ltd., Shanxi Ruisai Ke Environmental Protection Technology Co., Ltd. Technology Co., Ltd., Aviation Industry (Xinxiang) Measurement Technology Co., Ltd., Beijing Institute of Metrology and Testing Science, Guangzhou Institute of Standardization, Huzhou Normal University, China Jiliang University. The main drafters of this document are. Dou Xiaoliang, Fu Yan, Wu Limin, Hou Changge, Sun Lijie, Xu Ling, Xue Ruide, Hao Xinyou, Zhao Xiaoning, Xue Minjie, Lü Hongnan, Cao Feng, and Zhu Peiwu. This document was first published as GB/T 29024.2-2016 in.2016, and this is the first revision.introductionMany fields require monitoring of particle contamination, such as the electronics industry, pharmaceutical industry, precision instrument (machinery) manufacturing industry, and medical field. Particle counters are effective devices for monitoring particulate contaminants in liquids. This document is intended to provide calibration procedures and verification methods for particle counters. Methods are used to ensure the accuracy of particle counter measurement results and the consistency of measurement results of different instruments. GB/T 29024 "Particle size analysis - Optical measurement of single particles" is a standard for particle counter measurement, calibration and verification methods. It is mainly used to determine the particle size and quantity in the air or liquid, and consists of four parts. --- Part 1.Light scattering aerosol spectrometer. Describes the measurement, calibration and verification methods of an optical aerosol particle counter. --- Part 2.Light scattering liquid particle counter. Describes a method for measuring the particle size and number concentration of particles suspended in liquids. Measurement, calibration and verification methods for light scattering liquid particle counters. --- Part 3.Light obscuration liquid particle counter. Describes a method for measuring the particle size and number concentration of particles suspended in liquids. Measurement, calibration and verification methods for light obscuration liquid particle counters. --- Part 4.Cleanroom light scattering particle counter. Describes the optical particle counter used to determine the particle size distribution of airborne particles. Methods of measurement, calibration and verification of counters. Optical measurement method for single particle size analysis Part 2.Light scattering liquid particle counters 1 Scope This document specifies a light scattering liquid particle counter for measuring the size and number concentration of particles suspended in liquids. (LSLPC) measurement, calibration and verification method. The light scattering method described in this document is based on single particle scattering measurements. The typical particle size range is between 0.1μm and 10μm. This method is suitable for evaluating the cleanliness of pure water and chemical reagents, as well as measuring the particle number concentration and particle size distribution in various liquids. The particle size measured by this method depends on the refractive index of the particle and the liquid medium, so the obtained particle size is the equivalent of the calibration particle in pure water. Effective particle size. This document contains the following. --- Particle size setting error; ---Counting efficiency; ---Particle size resolution; ---False count rate; --- Maximum particle number concentration; ---Sampling flow error; ---Sampling time error; ---Sampling volume error; ---Calibration interval; ---Test and calibration report. 2 Normative references This document has no normative references. 3 Terms and Definitions The following terms and definitions apply to this document. 3.1 calibration particle calibrationparticle Monodisperse spherical particles of known average particle size, such as polystyrene latex spheres (PSL), whose standard values can be traced back to the International System of Units. (SI), the standard uncertainty of the mean diameter is no more than 2.5%. At a wavelength of 589nm (sodium D line), the refractive index of polystyrene latex particles is Approximately 1.59. NOTE. For spherical particles, the particle size is equal to the diameter. 3.2 Counting efficiency The ratio of the particle number concentration obtained by the light scattering liquid particle counter (3.4) and the reference instrument when measuring the same sample. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 29024.2-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 29024.2-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 29024.2-2025_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 29024.2-2025_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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