Development of a colorimetric array to discriminate cutting agents in seized cocaine samples

Digital Image Colorimetry Smartphone Determination of Acetaminophen

“…Table shows some examples of the application of the smartphone as a teaching aid in the analytical, forensic, and environmental sciences, principally using the RGB color model; however, other color models and Apps have been attempted. Previous publications in this Journal have highlighted their application for developing the understanding of the science behind analytical systems such as fluidics, kinetics, − spectroscopy and digital color, − and fluorescence, − along with the possibility of undertaking experiments outside of the laboratory at home. − Previously, using such an approach, it has been shown possible to colorimetrically determine a number of different drugs using the camera on a smartphone. − It has been shown possible to determine the concentration of the drug in sample solutions following the construction of a calibration curve. In this student laboratory practical, the possibility of utilizing such an approach for the determination of acetaminophen and its quantification of unknown samples is described.…”

Smartphone‐based colorimetric determination of gamma‐butyrolactone and gamma‐hydroxybutyrate in alcoholic beverage samples

“…Smartphones have a range of sensors allowing for numerous applications, including; cameras, barometers, accelerometers, gyroscopes, luxometers, magnetometers, among others, that can be used to take a variety of measurements with good precision [31,32]. Previously, it has been shown possible to colorimetrically determine the number of different drugs [33][34][35][36][37][38][39] and either qualitatively or quantitatively determine these using the camera on a smartphone. These previous investigations have utilized subsequent processing of the images obtained, with a readily available, downloadable free App, to examine the red, green, blue (RGB) color balance of the colorimetric reaction.…”