A portable smartphone-based colorimetric sensor for rapid determination of water content in ethanol

A Novel Amperometric Biosensor Based on Poly(allylamine hydrochloride) for Determination of Ethanol in Beverages

“…For these reasons, ethanol detection is of great importance for clinical and industrial applications. Some of the most common detection methods for ethanol include high performance liquid chromatography [ 1 ], gas chromatography [ 2 ], capillary electrophoresis [ 3 ], colorimetry [ 4 ], Raman spectrometry [ 5 ], or tandem techniques [ 6 , 7 ]. Although some of the above methods are complex and reliable, they can have disadvantages such as the need to use previous processes of sample separation (distillation, pervaporation), can be time consuming, and instruments can be expensive and need trained operators.…”

Progress in the design of portable colorimetric chemical sensing devices

“…The RGB values obtained are typically converted to a standard color space to enable accurate color representation and comparison across different devices and systems. 40,41 A portable handheld RGB-based colorimetric device for self-referenced solution-based determination of the analyte is shown in Fig. 2 (a-c).…”

Non-destructive measurement technique for water content in organic solvents based on a thermal approach

“…Shahvar et al developed a method for detecting water content in ethanol based on the color-changing of cobalt( ii ) chloride. 22 The method could detect the water contamination in ethanol in the range of 0.05–2.00% v/v with a recovery of more than 88%. Wang et al proposed a method for the detection in six organic solvents based on red-emitting carbon dots (RCDs).…”