By use of caustic washing electrofining method to decrease the acidity of straight run diesel oil,serious diesel oil emulsification problem can occure often.
The tautomeric equilibrium between the azo type and the hydrazone type of these compounds in different solvents and different acidity has also been studied.
The RE impurities in 4N lutecium oxide are determined by ICP-AES in this paper.The effects of matrix concentration acidity on tested element are analysed.
Assaying respectively the turbidity, acidity saccharometer degree, active protein, and active polyphenolics has beenstudied on the effects of enzymic process on the turbidity of apple juice.
The biruet can develop the color with the cupric sulfate in the alkaline solution, we call that the biruet reaction.Malonyl urea has acidity, so we call it barbituric acid.