| Frohn | Damianus, German physician, *1843. See: Frohn's reagent. (05 Mar 2000) |
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| Frohn's reagent | Bismuth subnitrate (1.5) and water (20.0) heated to boiling, to which hydrochloric acid (10.0) and potassium iodide (7.0) are added; used to test for alkaloids and for sugar. (05 Mar 2000) |
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