Therefore, the tandem MSZPs/Na 2S 2O 8 provides an interesting method to degrade some organic pollutants in water. Finally, the photodegradation activity of MSZPs was increased by the addition of Na 2S 2O 8 (250 mg L −1). In addition, the effect of initial concentration of fungicides was studied in order to know maximum degradation efficiency. However, in contrast to ZnO nanopowder, the photodissolution of Zn using MSZPs was low, with Zn 2+ concentration at the end of the experiment (0.75 mg L −1) below legally permitted levels in drinking water. The optimum mass ratio of SiO 2 to ZnO was about 1:2 because of almost complete coverage by ZnO surface coverage and the high photocatalytic degradation rates obtained for the studied fungicides, which was comparable to that obtained with ZnO nanopowder. Magnetic particles composed of a silica undercoat beneath a ZnO coating (MSZPs) were more efficient than magnetic particles loaded with ZnO alone (MZPs) for catalysing the removal of these fungicides. The photocatalytic efficiency of the magnetic particles was assessed by their ability to degrade six fungicides in water exposed to solar irradiation. Excipients present in the tablets did not interfere in the assay.ZnO (zincite) coated magnetic particles were successfully prepared and characterized by different techniques (XRD, FE-SEM, EDX, and FTIR). The method was successfully applied to the determination of gemifloxacin in pharmaceutical tablets without any pre-treatment. The software package was UV Winlab, which was set to measure in the range. Recoveries ranging from 96.26% to 103.64% were obtained. Electrochemical techniques such as CV, DPV, and SWV are consistently used. The calibration was linear from 0.5 to 10.0 μM, and the limits of detection and quantification were 0.15 and 5.0 μM. A differential-pulse voltammetric procedure for the quantitation of gemifloxacin has been developed and suitably validated with respect to linearity, limits of detection and quantification, accuracy, precision, specificity, and robustness. Voltammograms of gemifloxacin in Tris–HCl buffer (pH 7.0) exhibited a well-defined single oxidation peak. Designed for busy pharmaceutical, manufacturing, industrial, food, or academic laboratories that require efficient operation combined with a wide-range of capabilities, the UV WinLab software is designed for simplicity and efficiency in data collection, processing and generating results. The effects of pH, scan rates, and concentration of the drug on the anodic peak current were studied. The electrochemical oxidation behavior and voltammetric assay of gemifloxacin were investigated using differential-pulse and cyclic voltammetry on a screen-printed carbon electrode.

Uv winlab dpv