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QPAC® 60 is made up of no less than 94% Poly(butylene carbonate) polymer and has less than 5% butylene carbonate and less than 1% (between 0.2%-0.8%) methylene chloride.

This page details the capabilities of the Bruker benchtop electron spin resonance machine for beer freshness.

液体校准单元可以将水标准标准蒸发到气流中，并在定义的痕量浓度下具有化合物。