提出了高效液相色谱法测定环境水中7种阴离子的方法.采用Asahipak ODP-50卡套柱(4.0 mm×150 mm,5 μm),柱温为40 ℃;流动相为邻苯二甲酸-乙腈-水(5∶14∶81);流速为1.5 mL·min-1;采用二极管阵列检测器(DAD),检测波长为266 nm;7种阴离子的峰面积与其浓度呈线性关系,相关系数在0.999 8~0.999 9之间.7种阴离子的回收率范围为95.3%~98.6%,F-、Cl-、NO-2、Br-、NO-3、PO3-4和SO2-4的检出限依次为8,14,34,59,37,30,80 μg·L-1;相对标准偏差(n=6)≤2.0%.该方法已用于地面水、地下水、矿泉水、饮用水及废水等样品的分析.

Seven anions,i.e.,F-,Cl-,NO-2,Br-,NO-3,PO3-4 and SO2-4,in environmental water were determined by HPLC,with Asahipak ODP-50 (4.0 mm×150 mm,5 μm) column at 40 ℃ as the stationary phase and a mixed solution containing phthalate additive,acetonitrile and water mixed in the ratio of 5 to 14 to 81 diode array detector by volume as the mobile phase at flow-rate of 1.5 mL·min-1.UV-detection at 266 nm with diode array detector (DAD) was applied to the determination.Linear relationships between values of peak area and concentration of the 7 anions were obtained with correlation coefficients ranging from 0.999 8 to 0.999 9.Detection limits (S/N=3) for the 7 anions found were 8,14,34,59,37,30 and 80 μg·L-1 respectively.Precision of the method was tested,giving values of RSD′s (n=6)≤2.0%.Tests for recovery were made by standard addition method,the results obtained were in the range of 95.3%-98.6%.The proposed method has been applied to the analysis of samples of surface water,ground water,mineral water,drinking water and waste water.