A highly selective and rapid anodic adsorptive voltammetric method was developed for the （determination） of ultra trace amount of ofloxacin at a carbon paste electrode（CPE）. The ofloxacin adsorbed on the surface o...A highly selective and rapid anodic adsorptive voltammetric method was developed for the （determination） of ultra trace amount of ofloxacin at a carbon paste electrode（CPE）. The ofloxacin adsorbed on the surface of the CPE in a 0.096 mol/L KHP-NaOH buffer solution（pH=5.6） could produce one oxidation peak at 0.92 V（vs.SCE） when scanning was performed from 0.4 to 1.4 V. The relationship between the peak current and the ofloxacin concentration was linear in the ranges of 5.5×10-9～5.5×10-8 mol/L（75 s accumulation） and 3.3×10-8～3.3×10-7 mol/L（30 s accumulation）. The correlation coefficients were 0.996 and 0.998, respectively. Its detection limit was 9.0×10-10 mol/L（S/N=3） for 150 s accumulation. The （electrode） reaction mechanism of ofloxacin was investigated. The proposed method was applied to analyze trace ofloxacin in urine samples. The result was in good agreement with that obtained by spectrophotometry （determination）.展开更多
Inclusion complex of ferrocene(Fc) with β-cyclodextrin(β-CD) has been synthesized in ethylene glycol. It was unsolvable in water and had been successfully used in the preparation of β-CD-Fc inclusion complex modifi...Inclusion complex of ferrocene(Fc) with β-cyclodextrin(β-CD) has been synthesized in ethylene glycol. It was unsolvable in water and had been successfully used in the preparation of β-CD-Fc inclusion complex modified carbon paste electrode (CFCPE). Using the inclusion complex as the electroactive substance greatly increased the stability and reproducibility of CFCPE than using Fc.展开更多
文摘A highly selective and rapid anodic adsorptive voltammetric method was developed for the （determination） of ultra trace amount of ofloxacin at a carbon paste electrode（CPE）. The ofloxacin adsorbed on the surface of the CPE in a 0.096 mol/L KHP-NaOH buffer solution（pH=5.6） could produce one oxidation peak at 0.92 V（vs.SCE） when scanning was performed from 0.4 to 1.4 V. The relationship between the peak current and the ofloxacin concentration was linear in the ranges of 5.5×10-9～5.5×10-8 mol/L（75 s accumulation） and 3.3×10-8～3.3×10-7 mol/L（30 s accumulation）. The correlation coefficients were 0.996 and 0.998, respectively. Its detection limit was 9.0×10-10 mol/L（S/N=3） for 150 s accumulation. The （electrode） reaction mechanism of ofloxacin was investigated. The proposed method was applied to analyze trace ofloxacin in urine samples. The result was in good agreement with that obtained by spectrophotometry （determination）.
文摘Inclusion complex of ferrocene(Fc) with β-cyclodextrin(β-CD) has been synthesized in ethylene glycol. It was unsolvable in water and had been successfully used in the preparation of β-CD-Fc inclusion complex modified carbon paste electrode (CFCPE). Using the inclusion complex as the electroactive substance greatly increased the stability and reproducibility of CFCPE than using Fc.
