中文摘要：

将样品预处理模块与自动化顺序注射系统相结合,建立了未经稀释的海水中痕量铜的分离富集方法。铜-PDC螯合物在样品预处理模块中被吸附在聚四氟乙烯微珠填充柱上,用少量甲醇洗脱后,将洗脱液引入电热原子吸收中测定。进样体积为1.0mL时,富集倍率为20,检出限为0.015μg/L,采样频率为26次/h,线性范围为0.05-1.00μg/L,相对标准偏差（RSD）为1.8%（0.50μg/L）。利用本方法分离富集并测定了标准海水样品NASS-5及近海水样中的铜含量,并进行了加标回收实验。

英文摘要：

An automated sequential injection system incorporating a sample pretreatment module was developed for the separation and preconcentration of ultra-trace copper in seawater without dilution. Cu-pyrrolidine dithiocarbamate （PDC） chelate was retained in a polytetrafluoroethylene （PTFE） beads packed column in the module, which was afterwards eluted with a small amount of methanol and the eluate was quantified by using electrothermal atomic absorption spectrometry （ETAAS）. An enrichment factor of 20, a limit detection of 0. 015 μg/L, along with a sampling frequency of 26/h were obtained with a sampling volume of 1.0 mL within the concentration range of 0.05 - 1.00 μg/L, achieving a precision of 1.8% RSD at the 0.50 μg/L level （n = 7）. The system was validated by analyzing a certified reference material of seawater, NASS-5, and further demonstrated by spiking recoveries in a coastal seawater sample employing various dilution factors.