SN EN ISO 13366-2 : 2007 CORR 2007

Foreword
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Factors affecting the results of measurements
   5.1 Sample bottles
   5.2 Sampling
   5.3 Preservation
   5.4 Sample storage and transport
   5.5 Interfering substances
   5.6 Sample quality at analysis
   5.7 Applied chemicals
   5.8 Instrument condition
   5.9 Working factor
   5.10 Testing volumes
6 Calibration
   6.1 Reference materials
   6.2 Calibration procedure
7 Sampling
8 Determination
9 Checks on performance in routine operation
   9.1 Blank checks
   9.2 Carry-over effect
   9.3 Ratio of reagent volume and test sample volume
   9.4 Pilot checks
   9.5 Additional instrument surveillance
   9.6 Repeatability
   9.7 Intralaboratory reproducibility
   9.8 External comparisons
10 Specific remarks for the use with milk from different
   species
   10.1 General
   10.2 Cow milk
   10.3 Goat milk
   10.4 Sheep milk
   10.5 Buffalo milk
11 Precision
   11.1 Repeatability
   11.2 Intralaboratory reproducibility
   11.3 Reproducibility
12 Test report
Bibliography

Provides guidance on the operating conditions for counting somatic cells, in both raw and chemically preserved milk, using fluoro-opto-electronic somatic cell counters in which either a rotating disc technique or flow cytometry is applied in the counting section.