Digi PREP blocks are Teflon coated to resist aggressive corrosive attack for guaranteed long life in harsh laboratory environments. Various sizes are available and offer the latest in graphite block digestion technology. All Digi PREP blocks are accepted and used in Environmental Protection Agency (E.P.A.) Office of Water Methods (i.e. 200.2, 200.7, 200.8, 200.9, 245.1 and 365.1) and Office of
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