Abstract: When the gel permeation chromatography (GPC) method and ultraviolet and visible spectrophotometer (UV) method are used to detect absorption capacity of polycarboxylate superplasticizer (PCE),the interference effects generated by grinding aids such as triethanolamine,sodium acetate,stearic acid and sodium lignosulphonate are studied respectively.The result shows that PCE and grinding aids can be separated effectively by GPC chromatographic column when GPC method is used to determine the adsorption capacity of PCE.Moreover,grinding aids have no significant impact on the detection results of PCE concentration and its adsorption capacity,with the interference coefficient close to zero.However,the determination of PCE concentration is influenced by grinding aids' absorption against ultraviolet when the UV method used to determine the adsorption capacity of PCE.Thus,the adsorption capacity calculation results are smaller than normal,or even negative.The interference coefficients of sodium lignosulphonate,triethanolamine,stearic acid and sodium acetate are 8.30,4.84,0.81,0.63,respectively.
杜勇, 郭丽萍, 杜小弟, 陈刚, 雷家珩. GPC测聚羧酸减水剂吸附量对水泥助磨剂的抗干扰作用[J]. 现代化工, 2017, 37(8): 211-213.
DU Yong, GUO Li-ping, DU Xiao-di, CHEN Gang, LEI Jia-heng. GPC's anti-interference effect against cement grinding aids when detecting adsorption of polycarboxylate superplasticizer. Modern Chemical Industry, 2017, 37(8): 211-213.
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