【摘要】 采用离子色谱法测定选矿废水中微量F-、Cl-、NO3-、SO42-的含量。以SH-AC-1型阴离子分离柱为离子交换柱,以2.5 mmol.L-1碳酸钠-3.5 mmol.L-1碳酸氢钠溶液为淋洗液,采用抑制电导器检测。F-、Cl-、NO3-、SO24-4种阴离子分别在0.01~4.0,0.01~15.0,0.01~15.0,0.01~30.0 mg.L-1范围内呈线性关系,检出限(3S/N)分别为6.13,3.89,5.86,8.49μg.L-1。方法用于选矿废水试样中4种阴离子的测定,加标回收率分别为97.5%,104.0%,102.0%,98.3%,相对标准偏差均小于4.0%。更多还原

【Abstract】 Contents of F-,Cl-,NO-3 and SO2-4 in waste water from ore dressing were determined by ion chromatography.The SH-AC-1 anion-exchange column was used for separation,and a mixture of solution of 2.5 mmol·L-1 Na2CO3 and 3.5 mmol·L-1 NaHCO3 was used as eluant.Inhibitory conductivity detection was adopted in the determination.Linearity ranges for F-,Cl-,NO-3 and SO2-4 were found in ranges of 0.01-4.0,0.01-15.0,0.01-15.0 and 0.01-30.0 mg·L-1,with detection limit(3S/N) of 6.13,3.89,5.86,8.49 μg·L-1 respectively.The proposed method was applied to the determination of the anions in waste water samples,values of average recovery found by standard addition method were 97.5%(F-),104.0%(Cl-),102.0%(NO-3) and 98.3%(SO2-4),and RSD′s(n=11) found were all less than 4.0%.更多还原