Slide test for fructose and other ketohexoses

Food

“…Pentoses, ketoses, and hexoses could be distinguished by classes through characteristic reactions with vanadate in sulfuric acid (79). Fructose was reported to give a specific green color with a phenol-glacial acetic acid reagent making its detection possible in the presence of other sugars (106). The use of the anthrone reaction was further studied with the successful resolution of mixtures of rhamnose, galactose, and galacturonic acid (71).…”

Pharmaceuticals

“…An improved method for the colorimetric determination of methyl ethers of dglucose with aniline and phthalic acid is reported (560). A slide test for the microdetection of fructose and other ketohexoses utilizes the reaction of these sugars with phenol-glacial acetic acidsulfuric acid reagent to produce a green color (415). A solvent diffusion technique has been developed for the microscopic identification of microgram quantities of D-mannose and D-lyxose (687).…”