l arginine u03b1 ketoglutarate 1 1 solution with a ph of approximately 3 u02dc 4 or l arginine u03b1 ketoglutarate 2 1 solution with a ph of approximately 6 5 u02dc 7 and obtaining a final product of l arginine u03b1 ketoglutarate 1 1 or 2 1 through spay drying the yield of the final product is approximately 94 for l arginine u03b1 ketoglutarate 1 1 and 97 for l arginine u03b1 ketoglutarate 2 1 through the process large amount of solvents is eliminated and reaction time is shortened but the yield is increased hence realizing mass production through reactor in a cost and time effective manner application_number US 92512510 A description referring to fig1 to 3 of the drawings a method of preparation of l arginine u03b1 ketoglutarate 1 1 and 2 1 according to a preferred embodiment of the present invention comprises the steps of i reacting methyl dichloroacetate and acrylic acid methyl ester with sodium methoxide to obtain dimethyl 2 2 dichloroglutarate ii reacting dimethyl 2 2 dichloroglutarate with a hydroxide solution to obtain a crude u03b1 ketoglutaratic acid aqueous solution iii purifying the crude u03b1 ketoglutaratic acid aqueous solution to obtain a purified u03b1 ketoglutaratic acid aqueous solution iv adjusting a concentration of the purified u03b1 ketoglutaratic acid aqueous solution by adding water v adding a quantity of solid l arginine to the purified u03b1 ketoglutaratic acid aqueous solution wherein the quantity of the solid l arginine is equals to one equivalent mole of the purified u03b1 ketoglutaratic acid aqueous solution for producing l arginine a ketoglutarate 1 1 wherein the quantity of the solid l arginine is equals to two equivalent moles of the purified u03b1 ketoglutaratic acid aqueous solution for producing l.