水源地5种阴离子的同时测定

建立用单柱阴离子色谱测定水源地水中的F~-、CI~-、NO_2~-、PO_4~(3-)、NO_3~(-)5种阴离子的方法。采用NJ-SA-4A阴离子交换柱、0.35 mmol/L NaCO_3和0.05mmol/L NaHCO_3混合溶液为流动相、电导检测器在11min内完成5种阴离子的测定。该法具有良好的线性相关性和重复性(相对标准偏差2.18%～4.33%),回收率为93%～109.5%。方法简便实用,用于实际样品分析,所得结果令人满意。

Determination of five anions in the water source

We developed the single column of anion to determine the F~-,CI~-,NO_2~-,PO_4~(3-),NO_3~- in the water source,we use the NJ-SA-4A as the anion exchange column,and we apply 0.35mmol/L NaCO_3 and 0.05mmol/ L NaHCO_3 mixed solvent as the mobile phase ,the detector can determine the content of F~-,CI~-,NO_2~-,PO_4~(3-),NO_3~- within 11 minutes.This method has good liner and repeatability (the RSD is between 2.18%～4.33%),and the recycling rate is in the range of 93%～109.5%,the result is good.