Abstract
The innovative, affordable assembled visible spectrophotometer employed in this study aims to analyze the absorption and emission of colorful metallic blends of colorful samples solution. It features a tungsten white light bulb source, an ammeter as a detection element, a digital voltmeter, a diffraction grating for light dispersion, a converging lens for light collimation, and filters of various wavelengths (blue, red, yellow, and yellow-green). The light bulb source was powered by a standard supply set at 6 V. Using metallic solutions of chromium chloride (CrCl3) and copper sulphate (CuSO4) with different filter wavelengths, the performance was assessed. The transmittance and absorbance of these metallic solution samples exhibit a linear relationship with approximately 3 % deviation compared to results from a commercial UV–VIS spectrophotometer (DR-6000). Similar investigations were conducted with equivalent quantities of CuSO4, CrCl3, and nickel chloride (NiCl2) solutions, showing a discrepancy ranging from 2 % to 8 % when compared with the commercial UV–VIS spectrophotometer. Therefore, in low-income countries like Ethiopia, colorful metallic solution samples can be effectively analyzed using the newly designed low-cost spectrophotometer.
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