论文部分内容阅读
建立了碱性条件下,样品液通过非化学计量的流动渗析,联用离子色谱,同时检测腈纶水溶液中Cl-,SO2-4,SCN-方法.渗析单元内样品液流速1.0 mL/min,接受液0.39 mL/min,离子色谱分析柱选择IonPac AG25+AS25,淋洗液为36 mmol/L KOH,流速为1.5 mL/min,抑制电导检测.本方法具有样品预处理与检测方便自动化、淋洗液不使用有机改进剂,分析周期适中的特点,用于实际腈纶水溶液中Cl-,SO2-4,SCN-分析,结果满意.“,”Simultaneous determination of Cl-,SO42-and SCN-in acrylic aqueous solution was realized by ion chromatography coupled with inline non-stoichiometric flow dialysis.The sample solution was diluted by 0.05％ TEA aqueous solution,which protected SO2-3 and facilitated precipitation of heavy cations.The inline flow dialysis removed insoluble matter,high polymer and several types of pigments.The amount of C1-,SO2-4 and SCN-was detected with ion chromatography.Sample solution flow rate was cntrolled at 1.0 mL/min and accepting solution flow rate was selected as 0.39 mL/min within dialysis unit.The IonPac AG25 + AS25/4.0 mm separation column was used with 36 mmol/L KOH solution as the eluent and the flow rate was set at 1.5 mL/min which suppressed conductivity and allowed for simultaneous determination.The current method features sample pretreatment with easy automatic detection.Organic improver is not contained in the eluent and the analysis period is moderate.This proposed method has been applied to the analysis of C1-,SO2-4 and SCN-in real acrylic aqueous solution,which gave satisfying results.