AS 2300.2.3-2008

1 - AS 2300.2.3-2008 METHODS OF CHEMICAL AND PHYSICAL TESTING FOR THE DAIRYING INDUSTRY - LIQUID MILKS-DETERMINATION OF THE...
1 - PREFACE
2 - METHOD
2 - 1 SCOPE
2 - 2 APPLICATION
2 - 3 REFERENCED DOCUMENT
2 - 4 PRINCIPLE
2 - 5 REAGENTS
2 - 5.1 General requirements
2 - 5.2 Reagents
2 - 5.2.1 Ionic strength adjuster (ISA)
3 - 5.2.2 Electrode soaking solution
3 - 5.2.3 Electrode cleaning solution
3 - 5.2.4 Iodide standard stock solution A (100 000 μg iodide/L)
3 - 5.2.5 Iodide standard solutions
4 - 6 APPARATUS
4 - 6.1 General
4 - 6.2 Apparatus
4 - 7 PROCEDURE
4 - 7.1 General information
5 - 7.2 Effect of light
5 - 7.3 Sample preparation
5 - 7.4 Calibration of millivolt meters
6 - 7.5 Calibration of specific ion meters
6 - 7.5.1 Meters reading in concentration units
6 - 7.5.2 Meters reading in iodide concentration with an electrical zero point equivalent to50 μg iodide/L
7 - 7.6 Calibration checks
7 - 7.7 Measurement of iodide content of milk
7 - 7.8 Recovery check
7 - 8 CALCULATION AND EXPRESSION OF RESULTS
8 - 9 REPEATABILITY
8 - 10 ACCURACY AND UNCERTAINTY MEASUREMENT
8 - 11 TEST REPORT
9 - APPENDIX A - CALCULATIONS TAKING ACCOUNT OF THE EFFECTS OF SAMPLE PREPARATION

This Standard sets out a method, using an iodide-selective electrode, for the determination of the iodide content of raw liquid milk and pasteurized milk. The method is applicable to raw liquid milk which is fresh, or freshly thawed if the sample was frozen, and which contains no added preservative.

This Standard sets out a method, using an iodide-selective electrode, for the determination of the iodide content of raw liquid milk and pasteurized milk.NOTE: The result may not include protein-bound iodine.

Originated as AS 2300.2.3-1981.
Second edition 2008.