Development of Axial Resolution Testing Device for Optical Coherence Tomograph for the Posterior Segment of the Human Eye and Measurement Uncertainty Analysis / 中国医疗器械杂志

Based on the analysis of the theoretical calculation model of axial resolution of optical coherence tomograph for the posterior segment of the human eye, a set of testing device for measuring its axial resolution is designed and developed. In view of a commercial ophthalmic optical coherence tomograph in clinical use, its axial resolution is calculated to be 5.07 μm theoretically, and the actual measurement value is 5.45 μm. The uncertainty of the detection device is evaluated and the result is (5.45±0.10) μm. The measurement error introduced by the testing device is very small. Meanwhile, the axial resolution measured by the testing device meets the requirements of the instrument(≤ 6 μm).

Analysis of Evaluation of Uncertainty in the Determination of Hesperidin in Jianwei Xiaoshi Tablets by HPLC / 中国药房

OBJECTIVE:To analyze the uncertainty of the evaluation of determination of hesperidin in Jianwei xiaoshi tablets by HPLC and find out influence factors.METHODS:The content of hesperidin in Jianwei xiaoshi tablets was determined by HPLC and its uncertainty was evaluated according to relevance standards.RESULTS:The uncertain value of each tablet was 0.003 mg.CONCLUSION:The uncertainty of this experiment is mainly caused by nonhomogeneity of sample.