DPC 17, Prevention of and Testing for Added Water in Milk

Item #: DPC-017

Published: 2017

Pages: 13

Adulteration of milk with water is not only illegal but also very costly for the dairy industry. This guideline describes proper production and sampling techniques, on the farm, in the tank truck and at the plant, to prevent the addition of water to milk as well as correct laboratory testing procedures to aid in its accurate detection.

DISCLAIMER: The DPC is not responsible for the use or application of the information provided in this Guideline. It is the responsibility of the user to ensure that the information addresses their needs and that any action taken complies with appropriate regulations and standards.

Table of Contents:
ABSTRACT
PREFACE
GUIDELINE PREPARATION AND REVIEW PROCESS
DISCLAIMER
TABLE OF CONTENTS
INTRODUCTION
FREEZING POINT THEORY
FACTORS AFFECTING FREEZING POINTS
     Freezing Point Range and Influence of Added Water
     Lower (More Negative) Freezing Points
     Influence of Cleaning/Sanitization Chemicals
     Sample Pre-Freeze
     Freezing and Holding Samples
FREEZE POINT AS AN INDICATOR OF ADDED WATER
     Regulatory Requirements and Guidelines
PREVENTION OF ADDED WATER
     On the Farm
     With the Tank Truck
     At the Plant
SAMPLING
TESTING
     Cryoscope Calibration
     Cryoscope Daily Performance Checks
     Cryoscope Sample Preparation and Testing
     Other Methods of Testing
INTERPRETATION AND FOLLOW-UP OF TEST RESULTS
     Farm Producer Samples
     Dairy Plant Testing Programs, Incoming Tank Trucks and Beyond
DETECTION OF INTENTIONAL ADULTERATION
PRODUCER PENALTY PROGRAMS
SUMMARY
REFERENCES
APPENDIX A – POLICIES OF REGULATORY AGENCIES

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DPC 17, Prevention of and Testing for Added Water in Milk

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