Different types of food should use different tools and methods: 1. Liquid sample: mix thoroughly, open the package by aseptic operation, draw it with a 100mL sterile syringe, and inject it into a sterile container. 2 Semi-solid samples: unpack the package by aseptic operation, use a sterile spoon to dig out samples from several parts, and put them into a sterile container. 3. Solid food: large pieces of whole food should be cut from different parts with sterile knives and tweezers. When cutting, both the surface and the deep part should be taken into consideration, and the representativeness of the sample should be taken into account; , Place in a sterile container. If it is to check the contamination of food, the surface sample can be taken; if it is to check the quality of food, it should be taken from the deep part. 4. Frozen food: Large packaged small pieces of frozen food are taken as small pieces; large pieces of frozen food can be sampled from different parts with a sterile knife or a small hand saw can be used to pick up samples from the frozen block. The fungus drill bit drilled the debris sample and put it into the container. Sampling of solid foods and frozen foods should also pay attention to the purpose of the inspection. If you need to check the contamination of the food, you can take the surface sample; if you need to check the quality of the sample, you should take a deep sample. 5. Production process monitoring (1) Workshop water. Tap water samples are taken from the taps in the workshop; cooling materials are taken from different parts of the workshop container with 100mL sterile syringes. (2) Hygienic monitoring of workshop countertops, utensils and hands of processing personnel. Wipe the 25cm2 area with a 5cm2 well sterile sampling plate and 5 sterile cotton swabs. If the collected surface is dry, wipe it with a cotton swab moistened with sterile diluent; if there is water on the surface, wipe it with a dry cotton swab. After wiping, cut the tip of the cotton swab into a sample container with sterile scissors. (3) Workshop air sampling. Direct dust reduction method. Place five common nutritional agar plates with a diameter of 90 mm in the four corners and the middle of the workshop, open the lid of the dish for 5 min, and then cover the lid for inspection.
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