离子色谱法测定水样中S^(2-)、SO_3^(2-)、SO_4^(2-)、S_2O_3^(2-)

Determining S^(2-)、SO_3^(2-)、SO_4^(2-)、S_2O_3^(2-) in water samples using by IEC method (ion chromatography)

该种方法利用离子色谱仪的电导检测器与电化学检测器串联 ,十几分钟即可连续完成水中S2 - 、SO2 - 3 、SO2 - 4、S2 O2 - 3 的测定 ,方法具有快速、高效、方便、灵敏、选择性好等特点。方法的检出限分别为 :S2 - 12 5 μg/L ;SO2 - 3 2 2 4 μg/L ;SO2 - 45 0 μg/L ;S2 O2 - 35 0 μg/L。相对标准偏差在 1 5 %～ 6 9%之间 ,能够满足水中S2 - 、SO2 - 3 、SO2 - 4、S2 O2 - 3四种阴离子分析测试的需要。

By using series connection of conductance detector and electrochemical detector for ion chromatographer, determining S 2- ,SO 2- 3,SO 2- 4,S 2O 2- 3 in water can be continuously finished over ten minutes, showing that this method is fast, efficient, convenient, sensitive and high selectivity. The detection limits of the method are respectively S 2- 12 5μg/L;SO 2- 3 22 4μg/L;SO 2- 4 5 0μg/L and S 2O 2- 3 5 0μg/L,the relative standard deviation is between 1 5% and 6 9% which can meet a demand for determining S 2- ,SO 2- 3,SO 2- 4 and S 2O 2- 3.