GB 4789.2-2022 Translated English of Chinese Standard (GB4789.2-2022): National food safety standard - Microbiological examination of food: Aerobic plate count
https://www.chinesestandard.net, 2022 M08 21 - 13 pages
This Standard specifies the method for the determination of aerobic plate count in food. This Standard applies to the determination of aerobic plate count in food.
1:10 sample homogenate aerobic plate count appropriate count range autoclaving at 121 buffer or sterile calculated by multiplying Calculation result Degree CFU and 300 colony count Colony count/CFU Calculation Colony count/CFU Uncountable colony growth colony number containing 225 mL count agar medium count in food count per g count/CFU Calculation result data is rounded Degree of dilution dilution Colony count/CFU dilution ratio distilled water equipment and materials Examination procedure Example g Distilled g mL homogenizer to beat larger flaky colonies Liquid sample main nutrient Medium and reagents micropipette mL of plate mL sterile straw multiplying the average number of colonies Number of plates piece of aerobic plate count agar Potassium dihydrogen phosphate Preparation method principle of rounding procedure for aerobic products are cultured rounded up according slap-type homogenizer Sodium chloride Sterile conical flask sterile homogeneous Sterile normal saline sterile petri dish Sterile phosphate buffer stock solution test piece uncountable Calculation result