A new colorful test for the detection of hidden blood in feces. K. Usami (Wien. k. Woch., 1926, no. 27)

Abstract

The author suggests the following method: take 5.0 of the test feces by eye, thoroughly grind it in a porcelain mortar with excess acetone and filter it, and the feces remaining on the filter is washed with acetone until almost discolored liquid flows out; after the acetone is squeezed with a pestle as much as possible, the feces is removed from the filter into another porcelain mortar, grinded with 20 cc. c. of a mixture of alcohol and glacial acetic acid (1 c. c. of acid to 1 c. c. of absol. alcohol), is filtered again, and 1 c. c. of the filtrate is poured into a mixture consisting of 1 c. of Leukomethyl-violett'a or Leukofuchsin with 2 drops of 3% hydrogen peroxide.