title: Chemiluminescence microflow injection analysis system on a chip for the determination of uric acid without enzyme.
abstract: A new microflow injection analysis (microFIA) system on a chip coupled with chemiluminescence (CL) for the non-enzymatic determination of uric acid is described. The microFIA system produced by using two transparent poly(methylmethacrylate) (PMMA) chips measured 50 x 40 x 5 mm, the microchannels, etched by CO2 laser, were 200 microm wide and 100 microm deep, and the volume of the reaction area (RA) was about 1.2 microL. The injection pump, with accurate time control, monitored all reagents, including the sample. The uric acid was sensed by the chemiluminescence reaction between luminol and ferricyanide. The linear range of the uric acid concentration was 0.8-30 mg/L and the detection limit was 0.5 mg/L (S/N = 3). The relative standard deviation was 4.42% for 5 mg/L uric acid (n = 8). The proposed method has been successfully applied to the non-separation determination of uric acid in human serum and urine.
authors.affiliation: Institute of Analytical Science, the Key Laboratory of Analytical Chemistry of Chongqing, Southwest Normal University, Beibei, Chongqing 400715, People's Republic of China.
authors.forename: Deyong
authors.initials: D
authors.lastname: He
authors.forename: Zhujun
authors.initials: Z
authors.lastname: Zhang
authors.forename: Ying
authors.initials: Y
authors.lastname: Huang
authors.forename: Yufei
authors.initials: Y
authors.lastname: Hu
authors.forename: Houjiang
authors.initials: H
authors.lastname: Zhou
authors.forename: Dinglong
authors.initials: D
authors.lastname: Chen
mesh_terms: D005292:Ferricyanides / Q000494:pharmacology; D017022:Flow Injection Analysis / Q000379:methods*; D006801:Humans; D008163:Luminescent Measurements / Q000295:instrumentation* / Q000379:methods*; D008165:Luminol / Q000494:pharmacology; D012972:Sodium Hydroxide / Q000494:pharmacology; D014527:Uric Acid / Q000097:blood* / Q000737:chemistry / Q000652:urine*
chemical_list: D005292:Ferricyanides; D014527:Uric Acid; D012972:Sodium Hydroxide; D008165:Luminol; C028033:potassium ferricyanide