Determination of hexafluorophosphate ionic liquid anion by reversed-phase ion-pair chromatography coupled with direct conductivity detection was written by Liu, Yu-zhen;Yu, Hong;Zhang, Ren-qing. And the article was included in Fenxi Ceshi Xuebao in 2012.Name: 1,2-Dimethyl-3-propyl-1H-imidazol-3-ium hexafluorophosphate(V) The following contents are mentioned in the article:
A reversed-phase ion-pair chromatog. method using direct conductivity detection was developed for the determination of hexafluorophosphate(PF–6) ionic liquid anion. Chromatog. separation was performed on a Diamonsil C18 reversed-phase column using ion-pair reagent-citric acid-acetonitrile as mobile phase. The effects of ion-pair reagent, volume fraction of acetonitrile, pH and column temperature on the retention factor and separation of PF–6 were investigated. The mechanism of retention in the separation was discussed. The optimized chromatog. conditions for the determination of PF–6 were using 0.05 mmol/L tetrabutylammonium hydroxide(TBAH)-0.038 mmol/L citric acid-35% acetonitrile(pH 5.5) as mobile phase, at a flow rate of 1.0 mL/min and a column temperature of 40°C. Under the optimal conditions, the retention time of PF–6 was less than 15 min and the baseline separation of PF–6 was achieved without any interference by other common anions(Cl–, NO–3, F–, Br–, SO-24 and BF–4). The detection limit(S/N=3) for PF–6 was 0.25 mg/L. The good linear relationship was obtained between chromatog. peak area and concentration of PF–6 in the range of 0.5-100.0 mg/L. The relative standard deviations(RSD, n=5) of chromatog. peak area and retention time were 0.17% and 0.15%, resp. The proposed method was applied in the determination of PF–6 in ionic liquids of 1-butyl-3-methylimidazolium hexafluorophosphate and 1-propyl-2, 3-dimethylimidazolium hexafluorophosphate. The spiked recoveries of PF–6 were 99% and 104%, resp. The good linearity and repeatability of the method could meet the requirements for the quant. anal. of PF–6 in ionic liquids The method is simple, accurate, reliable and practical. This study involved multiple reactions and reactants, such as 1,2-Dimethyl-3-propyl-1H-imidazol-3-ium hexafluorophosphate(V) (cas: 157310-73-1Name: 1,2-Dimethyl-3-propyl-1H-imidazol-3-ium hexafluorophosphate(V)).
1,2-Dimethyl-3-propyl-1H-imidazol-3-ium hexafluorophosphate(V) (cas: 157310-73-1) belongs to imidazole derivatives. Imidazole is a heterocyclic compound with a five-membered planar ring. It is amphoteric and highly polar. Imidazole is incorporated into many important biological compounds. The most pervasive is the amino acid histidine, which has an imidazole side-chain. Histidine is present in many proteins and enzymes, e.g. by binding metal cofactors, as seen in hemoglobin.Name: 1,2-Dimethyl-3-propyl-1H-imidazol-3-ium hexafluorophosphate(V)
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem