Department of Applied Chemistry, Faculty of Systems Engineering, Wakayama University, Wakayama, Japan.
Anal Chem. 2012 Apr 17;84(8):3710-5. doi: 10.1021/ac300250b. Epub 2012 Mar 30.
A novel flow injection analysis (FIA) system for ultra-high-sensitive determination of Na(+), which involves laser interferometric photothermal equipment as the detector, was designed using a proton-dissociable chromogenic calix[4]arene derivative with a dinitrophenol moiety as the extraction-photometric reagent. The chromogenic calix[4]arene derivative showed an excellent extractability toward Na(+), which reflected the cation-complexing property of the tetraethyl ester derivative of calix[4]arene. As the calibration graph of the Na(+) concentration could be successfully obtained at the nanomolar level by this method, the proposed FIA system was found to be promising for highly sensitive determination of Na(+) in very dilute samples such as supply water and cooling water in power plants.
一种新型的流动注射分析（FIA）系统，用于超灵敏测定钠离子，该系统使用带有二硝基苯酚部分的质子离解显色杯[4]芳烃衍生物作为萃取-光度试剂，激光干涉光热设备作为检测器。显色杯[4]芳烃衍生物对钠离子具有极好的萃取能力，这反映了杯[4]芳烃四乙酯衍生物的阳离子络合性质。由于该方法可以在纳摩尔水平成功获得钠离子浓度的校准曲线，因此该 FIA 系统有望用于非常稀释的样品（如发电厂的供水和冷却水）中钠离子的高灵敏度测定。
