A novel nitrogen-doped carbon quantum dots(N-CDs)were prepared by the microwave irradiation method.The fluorescence quenching effect of Co(II)on the N-CDs was studied in the sodium dodecyl sulfate(SDS)medium and the fluorescence quenching was sensitized in the SDS.The linear range of calibration curve for the determination of Co(II)was 0.17 pg/mL-11.8 pg/mL and the limit of detection was 0.052 pg/mL.The method has been applied for the determination of Co(II)in samples with satisfactory results.
Ionic liquids functionalized β-cyclodextrin polymer, a mono-6-deoxy-6-（1,2-dimethylimida- zolium）-β-cyclodextrin iodide polymer （ILs-β-CDCP）, was synthesized as a solid-phase adsorbent coupled with high-performance liquid chromatography for separating or analyzing magnolol in drug samples. The results showed that magnolol was adsorbed rapidly on ILs-D-CDCP and eluted with methanol. Under the optimum conditions, preconcentration factor of the proposed method was 12. The linear range, limit of detection （LOD）, correlation coefficient （R） and relative standard deviation （RSD） were found to be 0.02-8.00 μg/mL, 1.9 ng/mL, 0.9992 and 2.76% （n=3, c=2.00 pg/mL）, respectively. The interaction between 1Ls-]）-CDCP and magnolol was studied through the inclusion constant, FTIR and TGA analysis. This proposed method has been successfully applied to the determination of magnolol in real samples.
