ntent="t" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; clear: both; min-height: 1em; font-weight: bold; color: rgb(117, 69, 230); line-height: 22px; font-family: PingFangSC-Semibold, "PingFang SC"; overflow-wrap: break-word !important;">食品微生物菌落总数的测定可以只做一个稀释度吗？
ntent="t" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; clear: both; min-height: 1em; font-weight: bold; color: rgb(117, 69, 230); line-height: 22px; font-family: PingFangSC-Semibold, "PingFang SC"; overflow-wrap: break-word !important;">菌落总数计数同一个稀释度一个在计数范围，一个不在计数范围，怎么计？
ntent="t" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; clear: both; min-height: 1em; font-weight: bold; color: rgb(117, 69, 230); line-height: 22px; font-family: PingFangSC-Semibold, "PingFang SC"; overflow-wrap: break-word !important;">菌落总数检测中，所有稀释度菌落都多不可计，记录结果怎么写？
ntent="t" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; clear: both; min-height: 1em; font-weight: bold; color: rgb(117, 69, 230); line-height: 22px; font-family: PingFangSC-Semibold, "PingFang SC"; overflow-wrap: break-word !important;">做菌落总数检测时，没有菌落是怎么回事？
ntent="t" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; clear: both; min-height: 1em; font-weight: bold; color: rgb(117, 69, 230); line-height: 22px; font-family: PingFangSC-Semibold, "PingFang SC"; overflow-wrap: break-word !important;">关于涂抹样品的检测，应当怎样计数和报告？
ntent="t" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; clear: both; min-height: 1em; font-weight: bold; color: rgb(117, 69, 230); line-height: 22px; font-family: PingFangSC-Semibold, "PingFang SC"; overflow-wrap: break-word !important;">无菌水、生理盐水、磷酸盐缓冲液三者有什么区别？
ntent="t" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; clear: both; min-height: 1em; font-weight: bold; color: rgb(117, 69, 230); line-height: 22px; font-family: PingFangSC-Semibold, "PingFang SC"; overflow-wrap: break-word !important;">食品中致病菌的检测必须在生物安全柜里进行吗？
ntent="t" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; clear: both; min-height: 1em; font-weight: bold; color: rgb(117, 69, 230); line-height: 22px; font-family: PingFangSC-Semibold, "PingFang SC"; overflow-wrap: break-word !important;">超净工作台需要定期测风速吗？
ntent="t" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; clear: both; min-height: 1em; font-weight: bold; color: rgb(117, 69, 230); line-height: 22px; font-family: PingFangSC-Semibold, "PingFang SC"; overflow-wrap: break-word !important;">经过灭菌后的平板最长可以保存多少天，还是仅限当天使用？
ntent="t" style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important; clear: both; min-height: 1em; font-weight: bold; color: rgb(117, 69, 230); line-height: 22px; font-family: PingFangSC-Semibold, "PingFang SC"; overflow-wrap: break-word !important;">培养基使用完之后，剩余的培养基再次使用是否重新灭菌？
答：不可以。这分为两种情况。第一种情况，已经凝固后重新融化后使用的，根据GB 4789.28-2013中明确规定，未用完的培养基不可重新凝固留待下次使用。遇到这种情况，培养基只能弃置，并且国标要求，弃置也需要符合相关法律法规的规定；第二种情况，首次灭菌后未用完的培养基，可待培养基凝固后再进行保存。但保存条件需避光干燥，保证其成分不会发生改变。再次使用时按照要求进行融化即可，不可二次灭菌。首次灭菌已开封但未使用完的培养基，不建议再次使用，毕竟存在风险。但若是液体培养基，就不存在融化的过程，首次灭菌后未使用完毕可按照国标要求保存，使用时需要保证培养基成分不发生改变，不可进行二次灭菌。若无法保证培养基是否符合要求，应当弃置。
