Using a Memmert vacuum oven VO, the department of quality assurance of the pharmaceutical expert determines the dry content of the gel capsules in accordance with standard 731 of the USP (United States Pharmacopoeia), and the moisture content in accordance with USP 921. With conventional drying, the moisture content of the gel capsules would fall below the necessary percentage of between 13 and 16%, which is why the drying process takes place in a vacuum drying oven.
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