研究了研磨液中氨三乙酸、柠檬酸和磷酸盐的离子色谱-抑制电导测定方法。采用Ion Pac AS11(4 mm×250 mm)分析柱以及相应的保护柱Ion Pac AG11(4 mm×50 mm),以20 mmol/L Na OH:H2O梯度洗脱,流速1.00 m L/min,进样量25μL。氨三乙酸、柠檬酸和磷酸盐质量浓度与其峰面积具有良好的线性和重复性,相关系数均不低于0.999,其检出限分别为0.02,0.02和0.05 mg/L。方法适用于研磨液中氨三乙酸、柠檬酸和磷酸盐含量的测定。 The ion chromatography-suppressed conductivity determination method of nitrilotriacetic acid, citric acid and phosphate in slurry was studied. Ion Pac AS11 (4 mm × 250 mm) analytical column and the corresponding guard column Ion Pac AG11 (4 mm × 50 mm) were used and eluted with a gradient of 20 mmol / L NaOH: H2O at a flow rate of 1.00 m L / min The sample volume is 25 μL. The linearity and repeatability of nitrilotriacetic acid, citric acid and phosphate were both linear with the peak area. The correlation coefficients were not less than 0.999. The detection limits were 0.02, 0.02 and 0.05 mg / L, respectively. The method is suitable for the determination of nitrilotriacetic acid, citric acid and phosphate in grinding fluid.