DNS colorimetry(3,5 dinitrosalicylic acid)was used to replace the way of classical KMnO 4 to determine sugar contents in tobacco.According to our repeated experiments it is known that brown reactant from 3,5 dinitrosalicylic acid reducing sugar of tobacco samples could keep stable for 6 hours after reaction,and recollection rate is 100 2%.And the accuracy is higher and cost lower compared with KMnO 4 titration way This way especially sui...
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