如何解决因回收率过低导致的假阴性问题，或者说如何回答审稿人提出的问题：If no internal standard was used in the process of method establishment, how to judge whether a false negative result is caused by low recovery or the true negative result is not detected when there is an undetected result in the actual detection of samples? How to eliminate false negative interference in actual testing? 感谢！！！
应助达人
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