1 Scope
This standard specifies the method for enumeration of coliforms in foods.
In this standard, Method I is applicable to the enumeration of coliforms in foods containing fewer coliforms and Method II to the enumeration of coliforms in foods containing more coliforms.
2 Terms and Definitions
2.1
Coliforms
Aerobic and facultative anaerobic Gram-negative non-spore bacillus that can ferment lactose and produce gas and acid under certain culture conditions.
2.2
Most probable number; MPN
An indirect enumeration method based on Poisson distribution.
3 Examination Principle
3.1 MPN method
Contents
Foreword i
1 Scope
2 Terms and Definitions
3 Examination Principle
4 Apparatus and Materials
5 Culture Media and Reagents
6 Examination Procedures
7 Operation Steps
8 Examination Procedures
9 Operation Steps
Appendix A Culture Media and Reagents
Appendix B MPN Retrieval Table of Coliforms
1 Scope
This standard specifies the method for enumeration of coliforms in foods.
In this standard, Method I is applicable to the enumeration of coliforms in foods containing fewer coliforms and Method II to the enumeration of coliforms in foods containing more coliforms.
2 Terms and Definitions
2.1
Coliforms
Aerobic and facultative anaerobic Gram-negative non-spore bacillus that can ferment lactose and produce gas and acid under certain culture conditions.
2.2
Most probable number; MPN
An indirect enumeration method based on Poisson distribution.
3 Examination Principle
3.1 MPN method
Contents of GB 4789.3-2016
Contents
Foreword i
1 Scope
2 Terms and Definitions
3 Examination Principle
4 Apparatus and Materials
5 Culture Media and Reagents
6 Examination Procedures
7 Operation Steps
8 Examination Procedures
9 Operation Steps
Appendix A Culture Media and Reagents
Appendix B MPN Retrieval Table of Coliforms