RESUMO
Fast isotopic separation of 10 B and 11 B boric acid by CZE was demonstrated. The BGE contained 25 mM phenylalanine and 5 mM putrescine (ÑÐ 8.95). The running conditions were +25 kV at 20°C with indirect photometric detection at 210 nm. Baseline separation was achieved in less than 9 min. RSD of migration times and corrected peak areas were less than 0.5 and 3%, respectively (n = 5). Linearity was demonstrated in the range 0.2-2 mM for 11 B and 0.2-0.5 mM for 10 B.
Assuntos
Ácidos Bóricos/química , Ácidos Bóricos/isolamento & purificação , Eletroforese Capilar/métodos , Ácidos Bóricos/análise , Concentração de Íons de Hidrogênio , Isótopos/análise , Isótopos/química , Isótopos/isolamento & purificação , Limite de Detecção , Modelos Lineares , Reprodutibilidade dos TestesRESUMO
Separation of (6)Li and (7)Li isotopes by CZE was demonstrated. The BGE contained 5 mM 4-aminopyridine, 0.9 mM oxalic acid, 0.25 mM CTAB, and 0.25% w/v Tween 20 (ÑÐ = 9.2). The running conditions were +25 kV at 30°C with indirect photometric detection at 261 nm. Under optimal experimental conditions, the analysis time was less than 21 min. Separation of Li preparations with mole fraction of (6)Li ranging from 3.44 up to 90.38% was demonstrated.