AS 1087-1991

1 - AS 1087-1991 SODIUM HYPOCHLORITE SOLUTIONS FOR USE IN THE DAIRYING INDUSTRY
4 - PREFACE
4 - CONTENTS
5 - FOREWORD
6 - 1 SCOPE
6 - 2 REFERENCED DOCUMENTS
6 - 3 DEFINITION
6 - 4 APPEARANCE
6 - 5 SAMPLING AND TESTING CONDITIONS
6 - 5.1 Test samples
6 - 5.2 Reagents
6 - 5.3 Timing of tests
6 - 6 CHEMICAL PROPERTIES
6 - 6.1 Available chlorine
6 - 6.2 Free sodium hydroxide
6 - 6.3 Sodium chlorate
7 - 7 STABILITY TO HEAT
7 - 8 KEEPING QUALITY
7 - 9 PACKAGING
7 - 10 INFORMATION TO ACCOMPANY EACH DELIVERY
7 - 11 MARKING
9 - APPENDIX A - RECOMMENDED PRACTICES FOR SANITIZING DAIRYING EQUIPMENT WITH SODIUM HYPOCHLORITE SOLUTION
9 - A1 INTRODUCTION
9 - A2 RECOMMENDATIONS
9 - A3 SUMMARY
9 - A4 CAUTION
10 - APPENDIX B - METHODS FOR THE DETERMINATION OF AVAILABLE CHLORINE
10 - B1 SCOPE
10 - B2 METHOD 1: DETERMINATION OF AVAILABLE CHLORINE IN UNDILUTED SODIUM HYPOCHLORITE SOLUTIONS
10 - B2.1 Principle
10 - B2.2 Reagents
10 - B2.3 Apparatus
10 - B2.4 Procedure
11 - B2.5 Calculation
11 - B2.6 Report
11 - B3 METHOD 2: DETERMINATION OF AVAILABLE CHLORINE IN DILUTED SOLUTIONS OF SODIUM HYPOCHLORITE USED FOR SANITIZING
11 - B3.1 Principle
11 - B3.2 Reagents
11 - B3.3 Apparatus
11 - B3.4 Procedure
11 - B3.5 Calculation
12 - B3.6 Report
13 - APPENDIX C - METHOD FOR THE DETERMINATION OF FREE SODIUM HYDROXIDE
13 - C1 SCOPE
13 - C2 PRINCIPLE
13 - C3 REAGENTS
13 - C3.1 General
13 - C3.2 Hydrogen peroxide solution
13 - C3.3 Barium chloride solution
13 - C3.4 Bromthymol blue indicator
13 - C3.5 Standard hydrochloric acid (approximately 0.1 mol/L)
13 - C4 APPARATUS
13 - C4.1 One- mark pipette
13 - C4.2 Burette
13 - C4.3 Graduating measuring cylinder
13 - C4.4 Conical flask
13 - C5 PROCEDURE
13 - C6 CALCULATION
13 - C7 REPORT
14 - APPENDIX D - METHOD FOR THE DETERMINATION OF SODIUM CHLORATE
14 - D1 SCOPE
14 - D2 PRINCIPLE
14 - D3 REAGENTS
14 - D3.1 General
14 - D3.2 Hydrogen peroxide solution
14 - D3.3 Sodium hydroxide pellets
14 - D3.4 Ferrous sulfate solution
14 - D3.5 Sulfuric acid (1 + 1)
14 - D3.6 Orthophosphoric acid solution
14 - D3.7 Standard potassium permanganate solution (approximately 0.02 mol/ L)
14 - D3.8 Potassium iodide (KI) crystals
14 - D3.9 Acetic acid (1 + 1)
14 - D3.10 Standard sodium thiosulfate solution (approximately 0.1 mol/L)
14 - D3.11 Starch solution (5 g/ L)
14 - D4 APPARATUS
14 - D4.1 One-mark pipettes
14 - D4.2 Burette
14 - D4.3 Graduated measuring cylinders
14 - D4.4 Volumetric flasks
14 - D5 PROCEDURE
14 - D5.1 Preparation of the sample solution
15 - D5.2 Determination of total oxidizing materials
15 - D5.3 Determination of oxidizing materials other than chlorate
15 - D6 CALCULATION
15 - D7 REPORT
16 - APPENDIX E - METHOD FOR THE DETERMINATION OF THE STABILITY OF SODIUM HYPOCHLORITE SOLUTION
16 - E1 SCOPE
16 - E2 PRINCIPLE
16 - E3 APPARATUS
16 - E3.1 Water bath
16 - E3.2 Test tubes
16 - E4 PROCEDURE

Specifies requirements for sodium hypochlorite solutions used as sanitizers in the dairying industry. Appendices cover recommended practices for sanitizing dairying equipment with sodium hypochlorite solution and describe methods for testing solutions for available chlorine, free sodium hydroxide, sodium chlorate, and stability to heat.

This Standard specifies requirements for sodium hypochlorite solutions for use as sanitizers in the dairying industry. Three nominal concentrations of solutions are specified, namely available chlorine contents of 50 g/L, 100 g/L and 125 g/L.NOTE: Recommendations for the use of sodium hypochlorite solutions for sanitizing operations are given in Appendix A.

Under Revision see DR 02393 CP