>Is it still possible to test for DNA on a cotton swab if it had been sprayed with luminal? A: This isn't really my field, so I'm not sure. It depends on whether the solvent for the luminol "denatures" or decomposes the DNA. I seem to recall that when luminol is used on a surface (a painted wall, say) that had blood smear on it, DNA can still be recovered from the area where the luminol indicates blood was present. But I may be thinking of visually-apparent (*without* luminol) blood spatters. DNA would quite likely be recoverable from those, if they're not too old. 有可能在用过光敏灵的棉花棒上取得DNA样本吗？ 这不是我的领域，所以我不是很确定。这取决於光敏灵溶剂有没有使得DNA受到损坏。 我似乎有印象，当光敏灵是用在一个光滑的表面时，如一面漆过的墙上的血迹，我们 仍可以取得DNA样本。不过这可能是指不用使用光敏灵就能看到的血迹。如果血迹没有 被曝露很久的话，取得它们的DNA并不是太大的问题。 --

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