Transcription of 2.2.32. LOSS ON DRYING - DrugFuture
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2.2.32. LOSS ON DRYING - DrugFuture
EUROPEAN PHARMACOPOEIA Loss on dryingTable Preparation of stacking gelComponent volumes (mL) per gel mould volume ofSolution components1mL2mL3mL4mL5mL6mL8mL10 mLWater solution(1) M Tris (pH )(2) g/L SDS(3) g/L APS(4) (5) (1) Acrylamide solution:30 per cent acrylamide/bisacrylamide (29:1) solution R.(2) M Tris (pH ):1 M tris-hydrochloride buffer solution pH R.(3) 100 g/L SDS: a 100 g/L solution ofsodium dodecyl sulfate R.(4) 100 g/L APS: a 100 g/L solution ofammonium persulfate R. Ammonium persulfate provides the free radicals that drive polymerisation ofacrylamide and bisacrylamide. Since ammonium persulfate solution decomposes slowly, fresh solutions must be prepared weekly.(5) TEMED:tetramethylethylenediamine Rfor at least 2 h (overnight incubation is possible).For silver staining, add to the final rinsing a step of 5 min in a20 g/L solution ofglycerol two sheets of porous cellulose film inwater Randincubate for 5 min to 10 min.
2.2.33. Nuclear magnetic resonance spectrometry EUROPEAN PHARMACOPOEIA 7.0 01/2009:20233 2.2.33. NUCLEAR MAGNETIC RESONANCE SPECTROMETRY INTRODUCTION Nuclearmagneticresonance(NMR)spectrometryisananalytical
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