离子色谱仪测定工业循环水中阴离子含量

Determination of Five Anions in Industrial Recycled Water by Ion Chromatography

采用化学抑制－电导－离子色谱法测定工业循环水中阴离子，以3．5mmol／L Na2CO3、1mmol／L NaHCO3为淋洗液。18．2mol／L H2SO4为再生液，流速1．2ml／min，5种阴离子在10．13min完成检测。各离子的检出限0．01～0．5mg／L，本法精密度小于2％，线性范围较宽，水样中各阴离子的平均加标回收率92．63％～103．57％。该法适合工业循环水中阴离子含量测定。

The chemically suppressed conductivity detection and ion chromatography were used to detect the content of five anions in industrial recycled water. They were separated simultaneously with a mixed solution of 3.5mmol/L Na2CO3 and lmmol/L NaHCO3 as absorbing solution, and 18.2 mol/L H2SO4 as regenerate solution. The samples were analyzed at the flow rate of 1.2mL/min, and were detected directly by conductimetric detector in 10. 13 minutes. Under the optimized condition,the detection limits for five analytes were from 0.01 to 0.5mg/L, RSD of the results were less than 2% ,The linear ranges were wide, average recoveries for five inorganic anions were between 92.63% - 103.57%. The method was suitable to determine the content of inorganic anions in industrial recycled water.