GB/T 32671.2-2019Colloidal systems -- Methods for zeta-potential determination -- Part 2: Optical methods (English PDF)

Foreword

GB/T 32671 "Method for measuring zeta potential of colloidal system" is divided into the following three parts.

--- Part 1. Electroacoustic and electric phenomena;

--- Part 2. Optical method;

--- Part 3. Acoustic method.

This part is the second part of GB/T 32671.

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

This section uses the translation method equivalent to ISO 13099-2.2012 "Colloidal system zeta potential measurement method Part 2. Optical

law".

The documents of our country that have a consistent correspondence with the international documents referenced in this part are as follows.

--- GB/T 32671.1-2016 - Determination of zeta potential of colloidal systems - Part 1 . electroacoustic and electro

(ISO 13099-1.2012, IDT);

---JJF1005-2016 Standard substance general terms and definitions (ISO Guide 30.2015, MOD).

This part is proposed and managed by the National Technical Committee for Particle Characterization and Separation and Screen Standardization (SAC/TC168).

This section drafted by. Shanghai Metrology and Testing Technology Research Institute, China Machine Productivity Promotion Center, Shanghai Institute of Technology, McMurridge

(Shanghai) Instrument Co., Ltd., Zhuhai Truth Optical Instrument Co., Ltd., Wuhu Dingheng Material Technology Co., Ltd., China Metrology University.

Introduction

The zeta potential is used to characterize the long-term stability of suspensions and emulsions, to study the surface properties and absorption of particles and liquids in contact with the surface of the particles.

A parameter with performance. The zeta potential cannot be directly measured. It is an experimentally measured parameter such as electrophoretic mobility.

The theoretical model is calculated. Optical methods, especially electrophoretic light scattering, have been widely used to determine particles or macromolecules in suspensions or solutions.

Electrophoretic mobility. This section provides methods for measuring electrophoretic mobility and calculating zeta potential by optical methods.

Colloidal system zeta potential measurement method

Part 2. Optical method

1 Scope

This part of GB/T 32671 specifies two methods for measuring the electrophoretic mobility of suspended particles in liquid. microscopy and electricity.

The stroboscopic scattering method, the estimation of the surface charge of the particles and the determination of the zeta potential can be measured by electrophoretic mobility and using a suitable theoretical model.

Type calculation.

Note. See ISO 13099-1 for related theory.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

ISO 13099-1 - Determination of zeta potential of colloidal systems - Part 1 . Electroacoustic and electro

Methodsforzeta-potentialdetermination-Part 1. Electroacousticandelectrokineticphenomena)

ISO Guide30 Reference Material General Terms and Definitions (Referencematerials-Selectedtermsanddefinitions)

3 terms, definitions and symbols

1 Scope 1

2 Normative references 1

3 terms, definitions and symbols 1

4 Measuring principle 3

5 Microscopy 3

6 Electrophoretic Light Scattering (ELS) 4

7 zeta potential calculation 8

8 Measurement step 9

Appendix A (informative) Electroosmosis in capillary sample cells 14

Reference 16

Foreword

GB/T 32671 "Method for measuring zeta potential of colloidal system" is divided into the following three parts.

--- Part 1. Electroacoustic and electric phenomena;

--- Part 2. Optical method;

--- Part 3. Acoustic method.

This part is the second part of GB/T 32671.

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

This section uses the translation method equivalent to ISO 13099-2.2012 "Colloidal system zeta potential measurement method Part 2. Optical

law".

The documents of our country that have a consistent correspondence with the international documents referenced in this part are as follows.

--- GB/T 32671.1-2016 - Determination of zeta potential of colloidal systems - Part 1 . electroacoustic and electro

(ISO 13099-1.2012, IDT);

---JJF1005-2016 Standard substance general terms and definitions (ISO Guide 30.2015, MOD).

This part is proposed and managed by the National Technical Committee for Particle Characterization and Separation and Screen Standardization (SAC/TC168).

This section drafted by. Shanghai Metrology and Testing Technology Research Institute, China Machine Productivity Promotion Center, Shanghai Institute of Technology, McMurridge

(Shanghai) Instrument Co., Ltd., Zhuhai Truth Optical Instrument Co., Ltd., Wuhu Dingheng Material Technology Co., Ltd., China Metrology University.

Introduction

The zeta potential is used to characterize the long-term stability of suspensions and emulsions, to study the surface properties and absorption of particles and liquids in contact with the surface of the particles.

A parameter with performance. The zeta potential cannot be directly measured. It is an experimentally measured parameter such as electrophoretic mobility.

The theoretical model is calculated. Optical methods, especially electrophoretic light scattering, have been widely used to determine particles or macromolecules in suspensions or solutions.

Electrophoretic mobility. This section provides methods for measuring electrophoretic mobility and calculating zeta potential by optical methods.

Colloidal system zeta potential measurement method

Part 2. Optical method

1 Scope

This part of GB/T 32671 specifies two methods for measuring the electrophoretic mobility of suspended particles in liquid. microscopy and electricity.

The stroboscopic scattering method, the estimation of the surface charge of the particles and the determination of the zeta potential can be measured by electrophoretic mobility and using a suitable theoretical model.

Type calculation.

Note. See ISO 13099-1 for related theory.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

ISO 13099-1 - Determination of zeta potential of colloidal systems - Part 1 . Electroacoustic and electro

Methodsforzeta-potentialdetermination-Part 1. Electroacousticandelectrokineticphenomena)

ISO Guide30 Reference Material General Terms and Definitions (Referencematerials-Selectedtermsanddefinitions)

3 terms, definitions and symbols