The oxidative cleavage of compounds Glucose (A) and Fructose (B) with HIO4 leads to the formation of acids and aldehydes. The ratios of formic acid to formaldehyde for (A) and (B) respectively are
51,32
Glucose5HIO4−−−−→5HCOOH+HCHO;Fructose5HIO4−−−−→3HCOOH+2HCHO+CO2