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AS 5013.28-2009
$87.70
Food microbiology, Method 28: Examination of specific products — Liquid milks and creams
This Standard sets out microbiological methods for the examination of liquid milk and liquid milk products such as homogenized and modified milks, buttermilks and creams.
Table of contents
Header
About this publication
Preface
1 Scope
2 Referenced documents
3 Diluents, culture media and reagents
3.1 General
3.2 Peptone salt solution
3.3 Trisodium citrate dihydrate (Na3C3H5O(COO)3.2H2O) solution 2%
4 Apparatus
5 Samples
5.1 Laboratory samples
5.2 Storage and laboratory samples
6 Preparation of test samples
6.1 Observation of physical condition and preparation for mixing
6.2 Mixing of sample
6.2.1 Liquid cream, liquid milks and liquid milk products
6.2.2 Thick or coagulated cream
6.3 Opening of containers
6.4 Preparation of dilutions for liquid milks and liquid milk products only
6.5 Preparation of dilutions for cream samples only
6.5.1 Liquid cream
6.5.2 Thickened or coagulated cream
7 General tests
7.1 Direct microscopic count
7.2 Specific microorganisms
7.3 Test for penicillin
8 Count of thermoduric bacteria in raw milk and cream
8.1 Laboratory pasteurization
8.2 Colony count
9 Phosphatase test for pasteurized milk and cream
10 Test report
Appendix A
A1 Scope
A2 Definitions
A3 Reagents
A3.1 Methylene blue staining solution (modification of Newman Lampert Stain)
A4 Apparatus
A4.1 Pipette or micropipettor
A4.2 Microscope
A4.3 Microscope slides
A4.4 Guide plate (template)
A4.5 Suitable ‘rake’
A5 Preparation of sample
A6 Method without defatting
A6.1 Preparation of smear for microscopic examination
A6.2 Staining
A7 Microscopic examination of stained smears
A7.1 Mounting the slide
A7.2 Number of fields to be counted
A7.3 Selection of fields
A7.3.1 General
A7.3.2 One field
A7.3.3 Two fields
A7.3.4 Four fields
A7.3.5 Eight fields
A7.4 Counting
A8 Calculations
A8.1 Microscope field area
A8.2 Microscope factor (MF)
A8.3 Microscopic count
Cited references in this standard
Please select a variation to view its description.
| Published | 14/07/2009 |
|---|---|
| Pages | 8 |
Please select a variation to view its pdf.
