无机阴离子在涂敷十六烷基吡啶的C_(18)键合相柱上的分离和测定

Column Coated with Cetylpyridinium ion for the Sefaraticn of Inorganic Anion by Ion-Interaction Chrcmatography

近年来,离子相互作用色谱法得到了迅速发展,使用这种方法,不仅可用有机树脂作固定相,同样可使用高效的键合固定相,并且可以通过改变离子相互作用,试剂在流动相中的浓度或涂敷在固定相上的量来改变柱的交换容量。实验使用常规的液相色谱仪,易于方法的广泛应用。在无机阴离子的分离中,这一方法显示了优越的分离效率。 本文研究了在涂敷十六烷基吡啶的C_8键合固定相上分离无机阴离子。

CPI (cetylpyridinium ion )is coated onto 10μm bonded-C18 phase,and the phase has been evaluated for the ion-exchange separation of inorganic anions.A linear relationship can be observed in the plot of retention times of inorganic anions against the theoretical capacity of the coated column.With phoshpate solution being used as eluent ant the theoretical capactty being selected at 41.3 equiv./g,IO3-,No2-,Br-,NO3-,S2O3-,I- and SCN- could be separated completely.detection limits of IO3-,NO2-,Br-,NO3-,and S2O32- are 10.4,8,6 and 100ng respectively at 205nm.