Lucke test

Lüc·ke test

(lik'ē),
a test for hippuric acid; hot nitric acid is added to the urine and evaporated to dryness; the presence of hippuric acid is indicated by an odor of nitrobenzol upon further heating.

Lücke,

George A., German surgeon, 1829-1894.
Lücke test - a test for hippuric acid.