GB/T 22231-2008 English PDF

US$279.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 22231-2008: Particle size distribution/fibre length and diameter distributions
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 22231-2008	279	Add to Cart	3 days	Particle size distribution/fibre length and diameter distributions	Valid

Similar standards

GB/T 21617   GB 23350   GB/T 24782   GB/T 22226   GB/T 22227   GB/T 22225   

Basic data

Standard ID: GB/T 22231-2008 (GB/T22231-2008)
Description (Translated English): Particle size distribution/fibre length and diameter distributions
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A80
Classification of International Standard: 13.300
Word Count Estimation: 12,191
Date of Issue: 2008-06-19
Date of Implementation: 2009-02-01
Quoted Standard: AHSI-C 690-75; ASTM-D 422; DIN-66115; DIN-66116; 1; NF-T 30-044
Adopted Standard: OECD 110-1981, IDT
Regulation (derived from): Announcement of Newly Approved National Standards No. 10 of 2008 (total 123)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the particle size distribution/fiber length and diameter distribution measurement method. A and B are two methods can be used pure or commercial products. Method A Determination of particle size distribution, only the water-insoluble powdery product. Method B measurement fiber length and diameter distribution, only fiber products. Should consider the impact of particle shape impure.

GB/T 22231-2008: Particle size distribution/fibre length and diameter distributions

---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.
Particle size distribution/fibre length and diameter distributions ICS 13.300 A80 National Standards of People's Republic of China Particle size distribution/fiber length and diameter distribution Posted 2008-06-19 2009-02-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard is equivalent to using the United Nations Organisation for Economic Co-operation and Development "OECD Guidelines for the Testing of Chemicals" 1101981, chemical testing methods "Particle size distribution/fiber length and diameter distribution method A. particle size distribution (effective hydrodynamic radius); Method B. Fiber The length and diameter distribution "(in English). For ease of use, this standard has been modified following editorial. "." A) the original title of the chapter numbering standard after removed; b) use punctuation instead of the original period indicated by the standard. "". ""; c) Note by the formula symbol in the symbol "---" instead of the "=." Appendix A of this standard is the data appendix. This standard is managed by the National Standardization Technical Committee chemicals dangerous (SAC/TC251) and focal points. Participated in the drafting of this standard. the Chemical Institute of Standardization, Jiangxi Exit Inspection and Quarantine, Chinese Academy of Inspection and Quarantine. Drafters of this standard. Yi Ming Wang Xiaobing, Zhu Jianxin, Falls Apart, Mei Jian, representing spring Rui, Wang Junbing, Zhou Wei, Hao Nan, Zhang Jun Xi. This standard is the first release.

Introduction

Many methods can be used to measure the particle size, but no single method is applicable to all particle size ranges, commonly used screening technology, micro-Shen Drop testing, panning. In addition, atmospheric particulate matter (dust, soot, smoke), radiation scattering and inertial especially useful. Should choose Sample test substance (Method A) suitable sampling procedure to prepare a typical representative. The first method (Method A) described in this standard is intended to provide a water-insoluble particulate matter data migration and settlement in water and air. For some special cases substance capable of forming a fiber, it is recommended to use another test method (Method B) to identify its intake by inhalation or orally The potential health hazards caused. A common method is commonly used, method hydrodynamic properties; Method B is relatively special, rarely used, and the need to use microscopy Mirror test. However, it should be borne in mind that the original particle size distribution depends largely on the industrial processing methods used and by subsequent Environmental changes and human transformation of. These test methods apply only to water insoluble (water-soluble less than 10-6g/L). By optical microscopy and found similar fibers known When Victoria substance or substances, or other material capable of releasing fibers may show the presence of fiber material, only the use of B. In this context Next, the fiber is insoluble in water, its aspect ratio (ratio of length to diameter) of greater than or equal to 3 and a diameter of less than or equal to 100μm. length Regardless of the fiber is less than 5μm. As a test effective hydrodynamic radius (RS) method A, without preliminary test, the test fiber And non-fibrous particles are applicable, but only for 2μm < RS < 100μm range of particles. Particle size distribution/fiber length and diameter distribution

1 Scope

This standard specifies the particle size distribution/fiber length and diameter distribution measurement method. A and B are two methods can be used pure or commercial products. A method for determination of particle size distribution (effective hydrodynamic radius), applies only to insoluble in water (less than 10-6g/L) of powdered product. Method B Determination of fiber length and diameter distribution, only for fibrous products. Should consider the impact of particle shape impure brought. Guidance information. Method A --- melting point; Method B --- melting point.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. ANSI-C690-75 Colt count ASTM-D422 Standard Test Method for solid particle size analysis [63 (2002)] DIN-66115 particle size analysis in the gravitational field of the sedimentation analysis pipette method DIN-66116, Part 1 size analysis sedimentation analysis in the gravitational field of deposit balance NF-T30-044 coating paints - Determination of particle size distribution "ANDREASEN" thin tube method

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 RS A method meaningful parameters in the viscous fluid, under the influence of gravity sedimentation rate of the spheres is given by the following formula. Where. Vp --- speed in meters per second (m/s); RS --- Stoke radius in meters (m); η --- liquid dynamic viscosity, in units of Pa s (bovine seconds per square meter) [Pa · s (N · s/m2)]. In other occasions it has a similar relationship. The size of the particles is usually micrometer (10-6m) measurements. 3.2 Figures 1 and 2 is a typical graph. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 22231-2008_English be delivered?

Answer: Upon your order, we will start to translate GB/T 22231-2008_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 22231-2008_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 22231-2008_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. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.