全自动双通道离子色谱仪的研制与应用
本文研制了一种用来同时检测环境水中的阴、阳离子含量的全自动离子色谱仪。本文首先介绍了仪器的结构和电控系统,接着对仪器的性能进行了测试。应用该仪器对阴离子(F-、Cl-、NO2-、Br-、NO3-、H2PO4-、SO42-)和阳离子(Na+、NH4+、K+、Mg2+、Ca2+)的含量进行测定,各种离子的检出限(S/N=3)和相对标准偏差分别为0.0005 mg/L和1.20%,0.0007 mg/L和1.02%,0.0032 mg/L和0.98%,0.0023 mg/L和0.95%,0.0804 mg/L和0.78%,0.0051 mg/L和0.77%,0.0016 mg/L和0.75%,0.0021 mg/L和0.28%,0.0073 mg/L和0.33%,0.0229 mg/L和0.92%,0.0161 mg/L和0.17%,0.0190 mg/L和0.93%;样品的加标回收率在91.6%~104.0%之间。使用配对t检验,将自动进样法和手动进样法测定结果进行对比,结果显示没有显著差异。