Valid

GB/T 21649.2-2017Particle size analysis -- Image analysis methods -- Part 2: Dynamic image analysis methods (English PDF)

Preview PDF

This is a limited preview

Buy now to download the full PDF (17 pages)

Need quotation for your management?

Get a formal quotation for GB/T 21649.2-2017 in 30 minutes.

Issued by

General Administration of Quality Supervision, Inspection and Quarantine

Level / Type

National · Recommended

Issue date

February 28, 2017

Implementation date

September 1, 2017

Scope

GB/T 21649.2-2017 (Particle size analysis -- Image analysis methods -- Part 2: Dynamic image analysis methods) is available as an English-translated PDF.

GB/T 21649.2-2017 — This Part of GB/T 21649 describe a method for controlling the position of moving particles in a liquid or gas and on a conveyor, as well as the image capture and image analysis of the particles.

The method is used to measure the particle sizes and their distributions, the particles being appropriately dispersed in the liquid or gas medium or on the conveyor.

Found what you need?

Document preview — GB/T 21649.2-2017

National Standard of the People's Republic of China

ICS
19.120
Classification
A 28

Issued by: General Administration of Quality Supervision, Inspection and Quarantine

Contents

  • Foreword...3
  • Introduction...4
  • 1 Scope...5
  • 2 Normative references...5
  • 3 Terms, definitions and symbols...5
  • 3.1 Terms and definitions...5
  • 3.2 Symbols...6
  • 4 Principle...7
  • 4.1 General...7
  • 4.2 Particle motion...7
  • 4.3 Particle positioning...8
  • 5 Operation steps...9
  • 5.1 General...9
  • 5.2 Still image resolution...9
  • 5.3 Calibration and traceability...10
  • 5.4 Size classes and magnification...10
  • 5.5 Particle edges...11
  • 5.6 Measurement...11
  • 6 Sample preparation...11
  • 7 Sample and measurement variability...12
  • Annex A (Informative) Particle velocity and exposure time recommended...13
  • Annex B (Informative) Maximum particle size recommended...17

Foreword

The following parts have been issued for GB/T 21649, Particle size analysis - Image

analysis methods:

-- Part 1: Static image analysis method;

-- Part 2: Dynamic image analysis methods.

This Part is Part 2 of GB/T 21649.

This Part is drafted in accordance with the rules given in GB/T 1.1-2009.

This Part is identical to ISO 13322-2:2006 Particle size analysis - Image analysis

methods - Part 2: Dynamic image analysis methods by the translation method.

The documents of our country that have a consistent correspondence with the

international documents referenced in this Part are as follows:

-- GB/T 21649.1-2008, Particle size analysis - Image analysis methods - Part 1:

Static image analysis method (ISO 13322-1:2004, MOD)

This Part makes the following editorial changes:

-- Correct "methods" in Clause 1 Scope of the international standard to "method",

and "these methods" to "the method".

This Part is put forward by and shall be under the jurisdiction of National Technical

Committee 168 on Screening and Particles Screen Analysis of Standardization

Administration of China (SAC/TC 168).

Drafting organization of this Part: Beijing Society for Powder Technology, Beijing

Physical and Chemical Analysis and Testing Center, Dandong Bettersize Instruments

Ltd., National Center for Quality Supervision and Inspection of Non-metallic Mineral

Deep Processing Products, China Productivity Center for Machinery, Beijing Hai'an

Hongmeng Standard Substance Technology Co., Ltd., Chizhou Daheng Biochemical

Co., Ltd., National Institute of Metrology, Spectris Instrumentation and Systems

Shanghai Ltd., National Center for Nanoscience and Technology, Shanghai Anlikang

Science Instrument Co., Ltd.

Main drafters of this Part: Zhou Suhong, Zhang Tao, Zhang Lixin, Dong Qingyun, Gao

Yuan, Yu Fang, Pan Junjie, Song Zhengqi, Hou Changge, Zhang Wenge, Qin Heyi, Liu

Junjie, Fang Qin, Li Zhaojun, Wang Hai, Fang Rong, Ma Jiang, Li Li, Hou Zhiyun, Gao

Jie, Qi Xiaoying, Zhang Chaoyi, Wang Xiaobing.

Particle size analysis - Image analysis methods - Part 2:

Dynamic image analysis methods

1 Scope

This Part of GB/T 21649 describe a method for controlling the position of moving

particles in a liquid or gas and on a conveyor, as well as the image capture and image

analysis of the particles. The method is used to measure the particle sizes and their

distributions, the particles being appropriately dispersed in the liquid or gas medium or

on the conveyor.

2 Normative references

The following referenced documents are indispensable for the application of this

document. For dated references, only the edition cited applies. For undated references,

the latest edition of the referenced document (including any amendments) applies.

ISO 13322-1:2004 [Translator's note: should be ISO 13322-2:2004], Particle size

analysis - Image analysis methods - Part 2: Dynamic image analysis methods

3 Terms, definitions and symbols

3.1 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

3.1.1

flow-cell

Measurement cell inside which the fluid-particle mixture flows.

3.1.2

orifice tube

Tube with an aperture through which a stream of fluid with dispersed particles flows.

3.1.3

sheath flow

(1), where t is either the strobe light emission time or camera shutter opening time (see

Figure A.1), i.e.

Without appropriate grey level handling, a shall not exceed either 0.5 pixel or x · (epsilon2 -

1) pixel, where epsilon is the ratio of the measured particle diameter to the static particle

diameter.

Grey level handling between pixel level and background level shall ensure that the

measured diameter of binary image b equals the diameter, x, of the static particle.

The total system resolution should be determined based on the particle size distribution

and the desired confidence limits (see ISO 13322-1:2004).

5.3 Calibration and traceability

The equipment shall be calibrated to convert pixels into SI length units (e.g.,

nanometres, micrometres, millimetres) for the final results. The calibration procedure

shall include verification of the uniformity of the field of view. An essential requirement

of the calibration procedure is that all measurements shall be traceable back to the

standard metre. This can be achieved by calibration of the image analysis equipment

with a certified standard stage micrometre.

Movement of particles during the capture of particle images, especially for smaller

particles, may introduce serious error in determining particle sizes. It is therefore

recommended that the whole system be verified with a standard reference material

under motion.

The calibration particles shall be selected to include the dynamic range of the entire

system. It is recommended to calibrate with three sizes of certified particles, i.e. with

values near the maximum, mid-point and minimum particle sizes to be measured with

the system.

5.4 Size classes and magnification

The theoretical limit for resolution of objects by size using image analysis is 1 pixel,

and counts should be stored particle by particle, with the maximum resolution of 1 pixel.

However, it is necessary to define size classes for the final reporting of the result, which

is a function of the total number of particles, the dynamic range and the number of

pixels included in the smallest considered objects. It is recommended that pixel size be

converted to actual size prior to any reporting of size for quantitative analysis.

For a system in which not all the particles are measured, large particles may often be

positioned on an edge of the image frame. Therefore, the magnification shall be selected

......

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

Referenced standards

How to Download GB/T 21649.2-2017

  1. 1

    Add to cart

    Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.

  2. 2

    Checkout

    Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).

  3. 3

    Instant delivery (0–9 sec)

    Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.

  4. 4

    Invoice included

    A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.

Related Standards

English PDF
17 pages
Instant delivery (0–9 sec)
Invoice included
View Cart

Secure payment via Stripe

Payments accepted

VisaMastercardAmerican ExpressApple PayGoogle PayStripe

GB/T 21649.2-2017

$315.00