@unpublished{SpangenbergWeyandtSpangenberg2016,
  author  = {Bernd Spangenberg and Marion Weyandt-Spangenberg},
  title   = {A Validated Quantification of Methadone in Liquids Using Thin-Layer Chromatography and a Flatbed Scanner},
  institution = {Fakult{\"a}t Maschinenbau und Verfahrenstechnik (M+V)},
  year    = {2016},
  abstract  = {We present a videodensitometric quantification method for methadone in syrup, separated by thin-layer chromatography (TLC). The quantification is based on a derivation reaction with Dragendorf reagent. Measurements were carried out using a 16-bit flatbed scanner. The range of linearity covers two magnitudes of power using the Kubelka-Munk expression for data transformation. The separation method is inexpensive, fast, and reliable.},
  language  = {en}
}