A slightly alkaline (pH 7.2) aqueous solution of periodate and permanganate can be used to detect sugars and their derivatives on filter paper after separation by chromatography.
Refer: SPRAY REAGENT FOR THE DETECTION OF CARBOHYDRATES
R. V. Lemieux and H. F. Bauer,Analytical Chemistry, Vol. 26, No.5, 1954, 920-921
There are many of stains reagent use to detect the carbohydrate and the best one which I use is (CAM reagent) Ceric Ammonium Molybdate also u can use Potassium Permanganate.