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1 Changing analyte recovery when using syringe filters

Question: I am doing a sunscreen analysis which requires that the sample solution is filtered. My diluent is 95/5 methanol/DI water and I am using MTC 0.45um nylon syringe filters. One day I observe consistent…

2 What is a pyrogen?

The definition according to answers.com is "A pyrogen is defined as a fever-producing agent. Pyrogens are substances that cause febrile reactions when sufficient amounts enter the circulatory system.…

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