【摘要】 研究了钠离子在不同的冠醚和阴离子染料体系中的显色反应。以题示体系进行了条件试验,并测定了部份样品,结果较满意。方法的表观摩尔吸光系数以钠计为8.63×10³Lmol^-1Cm^-1。更多还原

【Abstract】 A sensitive extractive-spectrophotometric method for the determination of sodium by using a pentadecyl benzo-15-crown-5 and dipicrylamine as a counter ion is described. The absorbance was measured at 420 nm and the value of molar absorptivity was 8.63 x103L.mol-1.cm-1. A line working range from 0 to 15 ug.5ml-1 of sodium was obtained. Potassium and ammonium ions gave the highest interference.更多还原