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April 29, 2010
Curse of the Plastic Tubes
In keeping with the problem discussed here ("sticky containers"), there's a report that a lot of common spectrometric DNA assays may have been affected by leaching of various absorbing contaminants from plastic labware. If the published work is shown relative to control tubes, things should be (roughly) OK, but if not, well. . .who knows? Especially if the experiments were done using the less expensive tubes, which seem to be more prone to emitting gunk.
We take containers for granted in most lab situations, but we really shouldn't. Everything - all the plastics, all the types of glass, all the metals - is capable of causing trouble under some conditions. And it tends to sneak up on us when it happens. (Of course, there are more, well, noticeable problems with plastics in the organic chemistry lab, but that's another story. Watch out for the flying cork rings!)
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