Optical molecular analysis using office flatbed photo scanner: New approaches and solutions

Método a bajo costo para la cuantificación del grado alcohólico en muestras de tequila blanco

“…En el caso de los resultados de la experimentación utilizando el espectrofotómetro se muestran en la Figura 5. Se observa una tendencia lineal, sin embargo algo a resaltar es que los espectrofotómetros se utilizan para cuantificar los analitos de preferencia diluidos para cumplir la linealidad marcada por la ley de Lambert-Beer y que en el presente proyecto se utilizaron soluciones concentradas de la solución oxidante, esto puede ser una razón por la cual el coeficiente de correlación es menor incluso que en el caso de los resultados del método propuesto por fotocolorimetría, sin embargo, con el 97.8% el resultado también es válido para análisis químicos (Oskolok, 2018).…”

Molecular Optical Analyzers Based on Smartphones for High School and Universities

“…One of the main advantages of a flatbed scanner is the high stability of the analytical signal measurement conditions. 6,7 On the other hand, a smartphone combines the functions of a rudimentary monochromator, detector, recording device, and means for processing measurement results in one compact stand-alone module. Although some publications describe the construction of homemade optical measuring devices from separate electronic componentslight-emitting diodes, photodiodes, and multimeters, etc.…”

“…One of the most promising ways to solve these problems is the active introduction of digital colorimetry into the educational process. Digital colorimetry has been widely used in chemical analytical practice over the past 20–25 years due to the widespread use of consumer optical devices: digital cameras, smartphones, flatbed scanners, and web-cameras, etc. − It combines the main advantages of chemical test methods (low cost, ease of use, and speed) and instrumental analysis methods (documented results and fairly high accuracy and sensitivity). On the one hand, the cost of consumer optical devices is from tens to hundreds of times lower than the cost of certified instruments.…”

“…For example, smartphones can be used as a radiation receiver in handmade spectrometers or in commercial spectroscopes with visual detection, and office flatbed scanners can be used to obtain digital images in planar chromatography. One of the main advantages of a flatbed scanner is the high stability of the analytical signal measurement conditions. , On the other hand, a smartphone combines the functions of a rudimentary monochromator, detector, recording device, and means for processing measurement results in one compact stand-alone module. Although some publications describe the construction of homemade optical measuring devices from separate electronic componentslight-emitting diodes, photodiodes, and multimeters, etc. − the development of optical analyzers based on smartphones and scanners , seems to be a more universal solution for various educational institutions, since they are widespread and affordable.…”

The Future Laboratory: Leveraging Consumer Imaging Devices for Student Projects and Sustainable, Accessible STEM Education.

“…OSKOLOK et al [20] described improvements through modifications and accessory components, including sample holders, a laser light source and optical filters, to office flatbed scanners to improve their use in colorimetry, photometry, fluorimetry, and nephelometry (light scattering of liquid suspensions). Similar endeavors would serve as useful educational projects for engineering students.…”