laboratory diagnostic - others - cAMP, plasma EDTA 1ml, Collect the sample on pre-cooled tubes. Centrifuge at 4°C. Separate the plasma and FREEZE immediately at -20°C.Do not use heparinised plasma and serum, The plasma must be frozen within 1 hour after collection and must be sent in the frozen samples container(!), Radioimmunoassay,ssso, todylaboratories®, bmn, code L16LD1606