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