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Preparation of the standard substance for the activity of Staphylococcus aureus in milk powder
[ Instrument Network Instrument Development ] Recently, the Science and Technology and Finance Department of the State Administration of Markets organized experts to carry out the “Study on the development of standard substances for Staphylococcus aureus bacteria in milk powder†(Project No.: 2017QK129) Acceptance. The acceptance expert group listened to the report of the project team and consulted the acceptance materials provided by the project team. After the inquiry, the inspection team considered that the project had completed the scheduled tasks, reached the specified assessment indicators, and agreed to pass the acceptance.
The project developed a candidate substance for the activity standard of Staphylococcus aureus in milk powder, and the sample matrix is ​​the actual milk powder product, which can effectively investigate the influence of the matrix effect on the target analysis. The standard substance candidate has a fixed value of 5593 CFU/bottle, a relative expansion uncertainty of 17%, good uniformity, and stable storage at -20 °C for 7 months. It is applicable to the method validation and detection of S. aureus detection process in milk powder. The result is quality control to fill the domestic gap.
The reference material will provide a good guarantee for the traceability, reliability and comparability of the test results; at the same time, it will provide strong technical support for the national food safety supervision and safety assessment; more importantly, it will drive the standard of bacterial cells in China. The development of substances, improve the types of bacterial bacterial reference substances in food, meet the needs of quality control and method validation of pathogenic microorganism testing laboratories in domestic and foreign foods, and contribute to the maintenance of national food safety.