This document gives guidelines for the establishment of a conversion relationship between the results of an alternative method and an anchor method, and its verification for the quantitative determination of the microbiological quality of milk.<\/p>\n
The conversion relationship can be used a) to convert results from an alternative method to the anchor basis or b) to convert results\/limits, expressed on an anchor basis, to results in units of an alternative method.<\/p>\n<\/div>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | European foreword Endorsement notice <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | Foreword <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | Introduction <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 4 Principles 4.1 General 4.2 Guidance for applied methods and laboratories <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 4.3 Organizational set-up 5 Consideration of factors influencing the conversion relationship 5.1 General 5.2 Environmental factors 5.2.1 General <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 5.2.2 Animal species 5.2.3 Bulk milk storage conditions 5.2.4 Seasonal variations 5.2.5 Sampling and pre-treatment of the test samples 5.2.6 Test sample preservation 5.2.7 Milk production conditions <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 5.3 Analytical factors 5.3.1 Instrument make and model 5.3.2 Chemicals 5.3.3 High somatic cell counts 6 Test samples 6.1 Calculation of number of test samples <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 6.2 Range of test samples 6.3 Representativeness of samples 6.4 Pre-treatment of test samples 6.4.1 General 6.4.2 Preparation of sub-samples <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 6.4.3 Storage and transport of sub-samples 7 Analysis 8 Establishing a conversion relationship 8.1 General 8.2 Validity of results <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 8.3 Conversion relationship 8.4 Calculations 8.4.1 General 8.4.2 Removal of outliers 8.4.3 Conversion relationship <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 9 Verification of a conversion relationship 9.1 Frequency of verification 9.2 Calculation 10 Test report <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Annex A (informative) Number of test samples for linear regression <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Annex B (informative) Example identification of outliers and calculation of conversion relationship <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Annex C (informative) Example \u2014 Calculation of significance (verification of conversion relationship) <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Milk. Quantitative determination of microbiological quality. Guidance for establishing and verifying a conversion relationship between results of an alternative method and anchor method results<\/b><\/p>\n |