摘要
利用戴安公司全新的谱睿(Pre)在线样品前处理技术,开发了一种柱前在线中和强碱性样品的方法,解决了强碱性基体中痕量离子难以测定的问题,并利用该方法对四丁基氢氧化铵中的痕量氯离子和溴离子进行了检测。该方法在常规离子色谱基础上增加一个输液泵、一个十通阀和一个在线中和CP2 H柱,提出了用大定量环替代浓缩柱,选取合适的时间窗阀切换时间窗,连接前处理设备与离子色谱分离部分。选择IonPac AS18分离柱和保护柱,淋洗液自动发生氢氧化钾淋洗液22 mmol等度洗脱。采用外标法定量,线性良好,氯离子和溴离子的标准加入回收率高。此方法具有操作简单、可重复性强、使用成本低等特点。
A new method to neutralize the strong alkaline sample before separation was developed.Dionex ＇Pre＇ online sample preparation was used to solve the difficult analyzing problem of the trace anion in the strong alkaline sample.Trace chloride and bromide in the solution of TBAH were analyzed by this method.An extra pump and a ten ports valve and an IonPac CP2 H＋ column need to be added to the system.We use a large loop instead of concentrator to connect ion chromatography system and pretreatment system by the applicationof appropriate valve switching time window.The analyte was seperated by the IonPac AS18 anion separation column and guard column with KOH 22 mmol isocratic eluent which generated by eluent generator（EG） automatically.The linearity and recoveries were good with the external standard method.The method developed in this paper had the characteristic of simplicity of operation,good repeatability and low cost.
出处
《化学试剂》
CAS
CSCD
北大核心
2011年第4期329-333,共5页
Chemical Reagents
