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压水堆核电厂一回路采用硼-锂协调曲线控制.在硼酸存在下,采用电感耦合等离子体发射光谱法测量一回路水质的锂,硼酸易结晶,对锂离子浓度测量存在干扰.本文采用变色强碱性阴离子交换树脂-电感耦合等离子体发射光谱在线联用分析系统,利用离子交换树脂的选择性在线去除一回路水质中的硼酸,消除硼酸对锂浓度测量的影响,实现锂浓度的准确分析.结果表明,采用检测波长为610.362 nm和670.784 nm的锂浓度测量的加标回收率分别为98.4％和101.9％,相对标准偏差分别为0.97％和 0.42％(n=6).所用系统具有结构简单、成本低、操作方便等优点,能有效避免雾化系统的硼酸结晶问题,消除硼酸对锂浓度测量的影响.“,”In pressurized water reactor nuclear power plants,the primary circuit control uses the boron-lithium coordination solution.Under the existence of the boric acid in the primary circuit water,boric acid easily crystallize in the atomization system of inductively coupled plasma optical emission spectrometer,which affect the determination of the lithium ion concentration.In this study,ion exchange resin-inductively coupled plasma optical emission spectrometer online combination analysis system was developed,which used allochroic ion exchange resin to remove the boric acid of the primary circuit water.Under the optimized conditions with the detection wavelength of 610.362 nm and 670.784 rim,the recovery of standard addition and relative standard deviations are 98.4％ and 101.9％,and the relative standard deviation is 0.97％ and 0.42％(n=6).The system has the advantage of simple structure,low cost,ease of building without the requirement of complexly fabricated devices,convenient operation,and completely removed boric acid.