title: Smartphone-based colorimetric analysis for detection of saliva alcohol concentration.
abstract: A simple device and associated analytical methods are reported. We provide objective and accurate determination of saliva alcohol concentrations using smartphone-based colorimetric imaging. The device utilizes any smartphone with a miniature attachment that positions the sample and provides constant illumination for sample imaging. Analyses of histograms based on channel imaging of red-green-blue (RGB) and hue-saturation-value (HSV) color space provide unambiguous determination of blood alcohol concentration from color changes on sample pads. A smartphone-based sample analysis by colorimetry was developed and tested with blind samples that matched with the training sets. This technology can be adapted to any smartphone and used to conduct color change assays.
authors.forename: Youngkee
authors.initials: Y
authors.lastname: Jung
authors.forename: Jinhee
authors.initials: J
authors.lastname: Kim
authors.forename: Olumide
authors.initials: O
authors.lastname: Awofeso
authors.forename: Huisung
authors.initials: H
authors.lastname: Kim
authors.forename: Fred
authors.initials: F
authors.lastname: Regnier
authors.forename: Euiwon
authors.initials: E
authors.lastname: Bae
mesh_terms: D000465:Algorithms; D003124:Colorimetry / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D019544:Equipment Failure Analysis; D000431:Ethanol / Q000032:analysis*; D006801:Humans; D008029:Lighting / Q000295:instrumentation / Q000379:methods; D000069550:Machine Learning; D008904:Miniaturization; D063731:Mobile Applications; D011934:Reagent Strips; D015203:Reproducibility of Results; D012463:Saliva / Q000737:chemistry*; D012680:Sensitivity and Specificity; D000068997:Smartphone / Q000295:instrumentation*; D013048:Specimen Handling / Q000295:instrumentation / Q000379:methods
chemical_list: D011934:Reagent Strips; D000431:Ethanol