preserve specimen formalin recipe preservation microscopy sample

Here is what you should have ready at home, in case you shed a sample
that the doctor should have investigated in the medical laboratory

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2225110/pdf/31.pdf

Consideration of the morphological and biochemical
integrity of the fixed tissue suggests that 4 per cent formaldehyde, buffered at
pH 7.2 with 0.067 M phosphate, and containing 7.5 per cent sucrose, is
the most suitable
of the fixatives for combined cytochemical staining and electron
microscopical studies.