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This work presents a combination of spectrophotometric and Digital Image-Based Colorimetric Analysis techniques. Both strategies were utilized for the fast and low-cost colorimetric determination of V(II). At the optimum conditions, the analytical characteristics of the two techniques (e.g., limit of detection and linear range) were evaluated. The new 8-HQ sensor shows high sensitivity over a wide range of V(II) analytes up 0.15µg/L in solution. It also was applied to determining V(II) ions in petroleum products.
We used Coker gasoline sample to determine the content V(II) analyte, the pre-detected sample of 22.0 mg/L V(II) was taken to be the basic concentration solution and the concentration of the V(II) ion before and after detection. The mother liquor of coker gasoline of 22.0 mg/L V(II) diluted with sweet Naphtha to 10, 2, 1, and 0.5 ppm solutions and detected using 15 mg of 8-HQ sensorin each case. Successive measurements were carried out using wide-range concentrations of the standard well-known solutions of analyte ions to ensure both accuracy and precision of the analyte ion detection system. Vanadium ion was detected by naked eye and determined by UV-Vis spectroscopy (Table 3), the results are shown in (Table 7).

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Last updated: September 27, 2019

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