Outside an ISO Class 5 air quality environment, dissolve the 3 grams of dehydrated Tryptic Soy Broth test media by adding 100ml of non-bacteriostatic water. Replace the lid and shake vigorously to ensure the powder has completely dissolved before proceeding.

Transport the prepared non-sterile test media to an ISO Class 5 air quality environment.
Within an ISO Class 5 air quality environment, arrange the vials into three sets, each containing three empty 10ml serum vials. Label one vial from each set as ‘Control [set number]’.

Using three 30ml sterile syringes, withdraw 25ml of test media into each. Transfer 5ml of test media from set one’s syringe into 10ml vial labeled ‘Control 1’. Repeat this process for the other sets using their respective syringes, resulting in 5ml in each control vial and 20ml remaining in each syringe.

Using aseptic techniques, affix a sterile 0.2 micron porosity filter and a 20-gauge needle to each syringe. Inject 10ml from set one’s syringe into both empty 10ml vials in set one then set aside. Repeat this process for the other sets using their respective syringes and affixed filters.

Write your name and date of preparation on all nine 10ml vial labels. Then, aseptically apply a sterile adhesive seal to the rubber closures and place the sealed vials inside the provided Whirl-Pak® bag for transfer to the incubator.
Incubate the nine 10ml vials at 20°–25°C (68°– 77°F) and 30°–35°C (86°– 95°F) for a minimum of 7 days at each temperature range to detect a broad spectrum of microorganisms. A total incubation period of at least 14 days is recommended to confirm the absence of microbial growth. For the vials not labeled as ‘Control [set number]’, any signs of microbial growth such as turbidity or precipitation, at any point during the incubation period, indicates a failure in the sterility test.