A proficiency test system to improve performance of milk analysis methods and produce reference values for component calibration samples for infrared milk analysis

Area of Science:

• Analytical Chemistry
• Laboratory Science

Background:

• Milk payment-testing laboratories require accurate and efficient analytical methods.
• Existing quality assurance and calibration methods can be resource-intensive.

Purpose of the Study:

• To assess the feasibility of integrating proficiency testing, quality assurance, and reference sample production.
• To improve resource efficiency, reduce costs, and maximize analytical accuracy in milk analysis.

Main Methods:

• Development of a multilaboratory combined proficiency testing and quality assurance system.
• Creation of modified milks for multiple purposes: proficiency testing, quality assurance, and reference material production.
• Implementation of monthly proficiency testing sample exchanges and annual technician meetings.

Main Results:

• Demonstrated improved analytical performance with reduced within- and between-laboratory variation.
• Established a system for producing reference values for infrared milk analyzer calibration.
• Facilitated communication and knowledge sharing among laboratory technicians.

Conclusions:

• The integrated approach is feasible and leads to enhanced analytical accuracy and efficiency.
• The system provides valuable reference materials for calibrating and troubleshooting infrared milk analyzers.
• Collaborative efforts improve overall laboratory performance and resource utilization.