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GBZ156-2025: Good practice for dynamic light scattering(DLS) measurements
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| GB/Z 156-2025 | English | 534 |
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Good practice for dynamic light scattering(DLS) measurements
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| GBZ 156-2013 | English | 359 |
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Report form and contents for radiation induced occupational diseases
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Standard similar to GBZ156-2025 GB/T 6003.2 | GB/T 19077 | GB/T 6003.1 | GB/T 5330 | Basic data | Standard ID | GB/Z 156-2025 (GB/Z156-2025) | | Description (Translated English) | Good practice for dynamic light scattering(DLS) measurements | | Sector / Industry | National Standard | | Classification of Chinese Standard | A28 | | Classification of International Standard | 19.120 | | Word Count Estimation | 26,249 | | Date of Issue | 2025-12-03 | | Date of Implementation | 2025-12-03 | | Issuing agency(ies) | State Administration for Market Regulation, Standardization Administration of China | GB/Z 156-2025: Good practice for dynamic light scattering(DLS) measurements---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.
GB /Z 156-2025.Operating Guidelines for Dynamic Light Scattering (DLS) Measurements
ICS 19.120
CCSA28
National Standardization Guiding Technical Documents of the People's Republic of China
Dynamic Light Scattering (DLS) Measurement Operation Guide
(ISO /T R22814.2020, IDT)
Published on 2025-12-03
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of contents
Preface III
Introduction IV
1.Scope 1
2 Normative References 1
3.Terms and Definitions 1
4.Instrument Type 1
4.1 Overview 1
4.2 Information before analysis 1
4.3 Sample Suitability for DLS Analysis 3
4.4 Sample Preparation
4.5 Instrument Calibration 7
4.6 Data Quality and Interpretation – Correlation Analysis 8
4.7 Data Quality and Interpretation – Frequency Power Spectrum Analysis 12
4.8 Method Robustness 16
Reference 18
Foreword
This document is a report-type guidance technical document.
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents".
Drafting.
This document is equivalent to ISO /T R22814.2020 "Guide to Operation of Dynamic Light Scattering (DLS) Measurements", and the document type is changed from ISO technical standard.
The technical report has been adjusted to become a national standardization guiding technical document in my country.
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed and is under the jurisdiction of the National Technical Committee on Standardization of Particle Characterization, Sorting and Screening (SAC/TC168).
This document was drafted by. Shandong University of Technology, Hefei Mingyuan Testing Technology Service Co., Ltd., and Hangzhou Hezhi Standard Technology Service Co., Ltd.
Company, Lihualianke (Beijing) Instrument Technology Co., Ltd., Shenzhen Guoji Instrument Co., Ltd., Zhuhai Zhenli Optical Instrument Co., Ltd., China Machinery Research Institute Standards & Technology Co., Ltd.
Precision Technology Research Institute (Beijing) Co., Ltd., Zhuhai Omec Instruments Co., Ltd., Chinese Research Academy of Environmental Sciences, Beijing Institute of Metrology and Testing
Research Institute, Aopote Technology (Shanghai) Co., Ltd., Suzhou Representative Office of Newpatek GmbH, Germany, and China Jiliang University.
The main drafters of this document are. Liu Wei, Yang Wen, Ji Yuanyuan, Zheng Aifen, Yin Baohui, Liu Yingying, Yang Zhenghong, Zhu Peiwu, Guo Bing, and Zhang Fugen.
Hou Changge, Fu Xiaowei, Zhao Xiaoning, Qin Fuyuan, Geng Jianfang.
Introduction
Dynamic light scattering (DLS) is a widely used characterization technique for particles with equivalent hydrodynamic diameters in the submicron range. Modern instruments allow...
While some users may have received limited training or lack background knowledge, the problem is that not all users are familiar with the technology.
The potential flaws and limitations of the results, and how to interpret them correctly.
Therefore, this document is formulated as an operational guide for dynamic light scattering measurements and as part of GB/T 29022-2021 "Dynamic Particle Size Analysis".
Supplement to "Light Scattering Method (DLS)".
Dynamic Light Scattering (DLS) Measurement Operation Guide
1 Scope
This document provides a guide to measurement and result interpretation using dynamic light scattering (DLS) technology, outlining how to perform measurements appropriately.
Information such as sample preparation methods, how to verify instrument operation, and how to correctly interpret data (including data quality assessment methods) is extensive.
GB/T 29022-2021 provides guidelines for measurement.
This document is intended to assist users in planning experiments for measurements of solid particles, emulsions, and bubbles, particularly regarding how to obtain the necessary samples.
For information and to determine whether DLS is the most suitable detection method, the focus should be on the practical operations required to obtain high-quality DLS measurement results.
It focuses on steps rather than theoretical discussions.
2 Normative references
This document has no normative references.
3 Terms and Definitions
This document does not contain any terms or definitions that need to be defined.
The URLs for the ISO and IEC standard terminology databases are as follows.
4.Instrument Types
4.1 Overview
Discussing best operating guidelines requires understanding the type of instrument used. Different optical configurations require different adjustment methods to control light transmission.
Different signal processing techniques require different methods to adjust background conditions; different analysis techniques require different conditions of the signal being processed.
Parameters. Two commonly used types are zero-error detection using correlation function processing (see 9.2 of GB/T 29022-2021) and using frequency...
Heterodyne detection for power spectrum processing (see 9.3 of GB/T 29022-2021).
Furthermore, the best operating guidelines related to the instrument type also depend on the scattering angle used for the measurement. For example, large particle impurities typically produce...
Forward scattering at a large angle is stronger than that at a large angle. Therefore, when measuring a sample using the forward scattering angle, it is usually necessary to carefully observe the sample before adding it.
The cleanliness of the cuvettes is ensured, large particle sizes are filtered out, and only the particle size distribution (PSD) of interest in the sample is retained. The injection filter is then discarded.
The first few drops of sample are used to remove filter residue. Furthermore, when the scattering angle is known to be close to 180°, higher-order scattering from high-concentration samples can be well observed.
Since the relaxation time is approximately equal to that of a single scattering event, backscattering can be used to characterize high-concentration media, provided that the volume scattering loss can be avoided.
Sample density. Many commercial instruments use optical, mechanical, or optomechanical means to move the optical detection point closer to the cuvette wall.
To reduce scattering loss.
4.2 Information before analysis
4.2.1 Sample Information
Customers or submitters of DLS-analyzed samples should provide as much information as possible related to the sample measurements. A lack of information does not preclude analysis.
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