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发表于 2017-9-12 11:54:26
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擦拭法不用做取样回收率,原因如下:
Recovery studies to determine percentage recovery from surfaces are not appropriate and are not normally done for microbiological sampling.
One reason for this is the question of enumeration in microbiological tests – “colony forming units” are typically counted as opposed to individual organisms.
A second reason for this is that vegetative organisms will die or lose viability when dried on a coupon in a standard sampling recovery procedure.
A third reason is that it is unclear which species should be used for a recovery study.
A fourth reason is that typically the limits set for bioburden are significantly below what could possibly cause either product quality issues or process performance (e.g., SIP) is-sues; therefore, even though recovery may be low (<50%), product quality and/or process perfor-mance is not impacted by not including a recovery factor.
你可以参考一下,
还有关于你说的“建议不使用擦拭法进行微生物限度的测试”是出于什么考虑??是怕擦拭取样影响微生物???是否有相关的出处??谢谢!
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