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Extraction and GC-MS or maybe LC-MS, if you really need to measure these specific impurities I don't know a lot about this area, but you are looking for very low amounts of impurities. For ethylene oxide, for example, your desired detection limit of 0.07 mg in a 10 g sample corresponds to 7 parts per million, or 7 ppm. Your limits for the glycols ...


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