Ultrasensitive detection of uric acid in serum of patients with gout by a new assay based on Pt@Ag nanoflowers |
| |
| Authors: | Xue Wang Shujun Chen Xiaomin Tang Daiqin Lin Ping Qiu |
| |
| Affiliation: | Department of Chemistry, Nanchang University, Nanchang 330031 China.; The Fourth Affiliated Hospital of Nanchang University, Nanchang 330003 China ; Jiangxi Province Product Quality Supervision Testing Institute, Nanchang 330047 China |
| |
| Abstract: | A ultrasensitive assay for the determination of uric acid (UA) based on Pt@Ag nanoflowers (Pt@Ag NFs) was constructed. H2O2 was formed by the reaction of uricase and UA and produced the hydroxyl radical (˙OH). The system was catalyzed by Pt@Ag NFs to change the color of 3,3′,5,5′-tetramethylbenzidine (TMB) from colorless to blue, and the morphology and chemical properties of Pt@Ag NFs were characterized by transmission electron microscopy and X-ray photoelectron spectroscopy. Under the optimized conditions, a linear relationship between the absorbance and UA concentration was in the range of 0.5–150 μM (R2 = 0.995) with a limit of detection of 0.3 μM (S/N = 3). The method can be applied to detection of UA in actual samples with satisfactory results. The proposed assay was successfully applied to the detection of UA in human serum with recoveries over 96.8%. Thus, these results imply that the UA assay provides an effective tool in fast clinical analysis of gout.A ultrasensitive assay for the determination of uric acid (UA) based on Pt@Ag nanoflowers (Pt@Ag NFs) was constructed. |
| |
| Keywords: | |
|
|
