- alkannin paper
- filter paper dipped in an alcoholic solution of alkannin; alkalis turn it blue, acids red.
Medical dictionary. 2011.
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alkannin — The major red dye derived from alkanet; used as an astringent, and in cosmetics and foods; can be used as an indicator : red at pH 6.8, changing to purple at pH 8.8 and blue at pH 10.0; also used as a fat stain. SYN: anchusin. * * * al·kan·nin al … Medical dictionary
method — The mode or manner or orderly sequence of events of a process or procedure. SEE ALSO: fixative, operation, procedure, stain, technique. [G. methodos; fr. meta, after, + hodos, way] Abell Kendall m. a … Medical dictionary