title: Development of an on-column enrichment technique based on C18-functionalized magnetic silica nanoparticles for the determination of lidocaine in rat plasma by high performance liquid chromatography.
abstract: In this study, a novel on-column enrichment technique filled with C(18)-functionalized magnetic silica nanoparticles was successfully developed for the determination of lidocaine in rat plasma by high performance liquid chromatography (HPLC). The synthesized Fe(3)O(4)@SiO(2)-C(18) nanoparticles were locally packed into the capillary by the application of magnets. Lidocaine in the sample solutions pumped into the capillary tube could be easily adsorbed by Fe(3)O(4)@SiO(2)-C(18) through hydrophobic interaction by the interior C(18) groups, and eluted by acetonitrile solution. Different extraction conditions were investigated. Method validations including linear range, quantification limit, detection limit, precision, accuracy and recovery were also studied. The results showed that the proposed method based on on-column enrichment by Fe(3)O(4)@SiO(2)-C(18) was a novel, little solvent and efficient approach for the determination of lidocaine in the complex plasma samples.
authors: Huashan Hospital, Department of Hand Surgery, Fudan University, Shanghai, China.
authors: Bin
authors: B
authors: Chu
authors: Dujuan
authors: D
authors: Lou
authors: Panfeng
authors: P
authors: Yu
authors: Shaonan
authors: S
authors: Hu
authors: Shun
authors: S
authors: Shen
mesh_terms: D000097:Acetonitriles / Q000737:chemistry; D000577:Amides / Q000097:blood / Q000302:isolation & purification; D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D057927:Hydrophobic and Hydrophilic Interactions; D008012:Lidocaine / Q000097:blood* / Q000302:isolation & purification; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D051381:Rats; D015203:Reproducibility of Results; D000077212:Ropivacaine; D012680:Sensitivity and Specificity; D012822:Silicon Dioxide / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D000097:Acetonitriles; D000577:Amides; D058185:Magnetite Nanoparticles; D012822:Silicon Dioxide; D000077212:Ropivacaine; D008012:Lidocaine; C032159:acetonitrile