1 - AS 2300.4.8-1994 METHODS OF CHEMICAL AND PHYSICAL TESTING FOR THE DAIRYING INDUSTRY - DRIED MILK AND DRIED MILK PRODUCTS - DE
1 - PREFACE
1 - METHOD
1 - 1 SCOPE
1 - 2 REFERENCED DOCUMENTS
1 - 3 PRINCIPLE
1 - 4 REAGENTS (See also Appendix A)
1 - 4.1 General
2 - 4.2 Sodium chloride
2 - 4.3 Amido black dye solution
2 - 4.4 Citric acid monohydrate
2 - 4.5 Sodium chloride, saturated solution
2 - 4.6 Standard dried skim milk powder
2 - 5 APPARATUS (See also Appendix A)
2 - 5.1 Balance
2 - 5.2 Stoppered test tubes
2 - 5.3 Filter funnel
2 - 5.4 Filter papers
2 - 5.5 One- mark pipettes
2 - 5.6 Capillary pipette or pipettor
2 - 5.7 One-mark volumetric flasks
2 - 5.8 Water bath
2 - 5.9 Glass centrifuge tubes
2 - 5.10 Centrifuge
2 - 5.11 Spectrophotometer
2 - 6 TEST SAMPLES
3 - 7 PROCEDURE
3 - 7.1 Determination
3 - 7.2 Zero UDWPN check
3 - 7.3 Standard curve
4 - 8 CALCULATION
4 - 9 REPEATABILITY
4 - 10 TEST REPORT
4 - 11 REFERENCES
5 - APPENDIX A - METHOD FOR DETERMINING THE UDWPN CONTENT OF THE STANDARD DRIED SKIM MILK POWDER
5 - A1 SCOPE
5 - A2 PRINCIPLE
5 - A3 REAGENTS
5 - A3.1 General
5 - A3.2 Sodium chloride
5 - A3.3 Hydrochloric acid solution (8. 5 g HCl/ 100 mL)
5 - A3.4 Reagents for the Kjeldahl determination of nitrogen
5 - A4 APPARATUS
5 - A4.1 Erlenmeyer flasks
5 - A4.2 Erlenmeyer flasks
5 - A4.3 Bulb pipettes
5 - A4.4 Straight pipette
5 - A4.5 Filter funnels
5 - A4.6 Watch- glasses
5 - A4.7 Filter papers
5 - A4.8 Water bath
5 - A4.9 Centrifuge bottles
5 - A4.10 Centrifuge
6 - A4.11 Apparatus for the Kjeldahl determination of nitrogen
6 - A4.12 pH meter
6 - A5 TEST SAMPLE
6 - A6 PROCEDURE
6 - A6.1 Determination
6 - A6.2 Blank test
7 - A7 CALCULATION