control of purity的用法和樣例：
例句
- Control of the chemical purity of WFI presents few major problems.
注射用水化學純度的控制是主要問題。 - A series of highly pure surfactants was synthesized.
合成了一系列高純度的表面活性劑。 - If the API has a specification for microbiological purity, appropriate action limits for total microbial counts and objectionable organisms should be established and met.
如果原料葯有微生物純度控制的指標，應制定合理的總的微生物和致病菌的限度。
