The purpose of the document is to establish a general and uniform method for the determination of scorched particles in milk powder.
2.0 SCOPE
This standard testing procedure is suitable for the determination of scorched particles in milk powder.
3.0 RESPONSIBILITY
The expert and trained chemist are responsible for following this procedure. The technical manager is responsible for implementing this procedure.
4.0 REQUIREMENTS
4.1 Apparatus
4.1.1 Analytical balance
4.1.2 Mixer
4.1.3 Scorched particles filtering Discs
4.1.4 Scorched particles discs test cards
4.1.5 Scorched particles tester. Aspirator type
4.2 Glassware
NA
4.3 Reagent
4.3.1 Defoaming Agent: Antifoam B emulsion
4.3.2 Water: Sediment free, distilled between 32.5 and 41°C
5.0 PROCEDURE
5.1 Measure 250 ml sediment-free water in the Waring blender jar.
5.2 Add 25 g of non-fat dry milk or dry buttermilk or 32.5 g of dry whole milk.
5.3 Add approximately 0.5 ml of antifoam B emulsion and mix for 60 seconds in the blender.
5.4 Filter the entire solution through a standard cotton disc, using an aspirator-type tester.
5.5 Rinse the mixing container in the tester with approximately 50 ml of sediment-free water, also passing this through the Cotton disc.
5.6 If the reliquified sample is allowed to stand before filtering, stir vigorously just before pouring it into the tester.
5.7 Remove the filter disc, place it in a scorched particle disc test card and dry it at 30°C to 40°C in a dust-free atmosphere.
5.8 Compare the dry disc, placed on a table and viewed from directly above with the scorched particle standard photo prints under uniform, indirect light. Any test falling between two Standard discs should be assigned the higher disc’s letter.
6.0 CALCULATION: NA
7.0 REVISION/CHANGE HISTORY
8.0 ATTACHMENTS
· Appendix-1: FLOW CHART FOR SCORCHED PARTICLE
9.0 REFERENCES
· IS-13500:1992:RA 2013
4.1 Apparatus
4.1.1 Analytical balance
4.1.2 Mixer
4.1.3 Scorched particles filtering Discs
4.1.4 Scorched particles discs test cards
4.1.5 Scorched particles tester. Aspirator type
4.2 Glassware
NA
4.3 Reagent
4.3.1 Defoaming Agent: Antifoam B emulsion
4.3.2 Water: Sediment free, distilled between 32.5 and 41°C
5.0 PROCEDURE
5.1 Measure 250 ml sediment-free water in the Waring blender jar.
5.2 Add 25 g of non-fat dry milk or dry buttermilk or 32.5 g of dry whole milk.
5.3 Add approximately 0.5 ml of antifoam B emulsion and mix for 60 seconds in the blender.
5.4 Filter the entire solution through a standard cotton disc, using an aspirator-type tester.
5.5 Rinse the mixing container in the tester with approximately 50 ml of sediment-free water, also passing this through the Cotton disc.
5.6 If the reliquified sample is allowed to stand before filtering, stir vigorously just before pouring it into the tester.
5.7 Remove the filter disc, place it in a scorched particle disc test card and dry it at 30°C to 40°C in a dust-free atmosphere.
5.8 Compare the dry disc, placed on a table and viewed from directly above with the scorched particle standard photo prints under uniform, indirect light. Any test falling between two Standard discs should be assigned the higher disc’s letter.
6.0 CALCULATION: NA
7.0 REVISION/CHANGE HISTORY
8.0 ATTACHMENTS
· Appendix-1: FLOW CHART FOR SCORCHED PARTICLE
9.0 REFERENCES
· IS-13500:1992:RA 2013
END OF THE DOCUMENT
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