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The use of an electrochemical detector (ECD) and core-shell columns as a new quantitative method for the analysis of α-, β-, and γ-cyclodextrin(αCD, βCD, and γCD, respectively) was investigated, and simple quantitative methods and appropriate measurement conditions were developed. The retention times of αCD, βCD, and γCD were determined to be 6.5, 12.9, and 10.4 min, respectively, when measured using an ECD, a 50°C column temperature, 0.5 mL/ min flow rate, 20 μL injection volume, 0.3 mol/L NaOH/0.3 mol/L CH3COONa=1/1 mobile phase, and an S-40/60=St (styrene)/DVB (divinylbenzene)-5TMA (trimethylamine) core-shell column. The calibration curves of αCD, βCD, and γCD demonstrated good linearity (R2>0.998). The repeatability, precision, and accuracy were acceptable (relative standard deviation <5% and Recovery=100 ± 5%). The limit of detection and quantification of αCD were determined to be 0.26 and 0.81 μg/mL, those of βCD were 7.65 and 23.19 μg/mL, and those of γCD were 3.87 and 11.74 μg/mL, respectively. Thus, analysis of the cyclodextrins αCD, βCD, and γCD could be carried out by a simple method using an ECD and a core-shell column.

Quantitative Analysis of Cyclodextrins by Electrochemical Detector and Column with Core-Shell Type Filler