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Joined 2026-09-21 Message
Incoming links: Colorimetry
Julius Neßler Created 2026-10-31 Updated 2026-11-05
Julius Neßler developed a reagent for detecting and estimating Ammonia by colour. In Nessler's reagent, an alkaline Mercury–iodide system produces a visible response; comparing a sample with standards of known concentration turns that observation into a colorimetry measurement. Equal viewing path lengths make the comparison meaningful.[ref]
https://homepages.uc.edu/~jensenwb/museum-booklets/04.%20Colorimeters.pdf. William B. Jensen, Colorimeters, p.3: Nessler, reagent and matching tubes
A chemist associated with Nessler's reagent. Deutsche Biographie, identity and dates. A verified external portrait appears in University of Cincinnati, Colorimeters booklet, figure 2 on PDF page 3; no standalone portrait URL was established for embedding.