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Measurement of Volatile Fatty Acids in Silage through Odors with Nanomechanical Sensors.

Kosuke MinamiHisami KobayashiMasaaki MatobaYuko KamiyaSubrata MajiTakahiro NemotoMasanori TohnoRyoh NakakuboGenki Yoshikawa
Published in: Biosensors (2023)
The measurement of volatile fatty acids (VFAs) is of great importance in the fields of food and agriculture. There are various methods to measure VFAs, but most methods require specific equipment, making on-site measurements difficult. In this work, we demonstrate the measurements of VFAs in a model sample, silage, through its vapor using an array of nanomechanical sensors-Membrane-type Surface stress Sensors (MSS). Focusing on relatively slow desorption behaviors of VFAs predicted with the sorption kinetics of nanomechanical sensing and the dissociation nature of VFAs, the VFAs can be efficiently measured by using features extracted from the decay curves of the sensing response, resulting in sufficient discrimination of the silage samples. Since the present sensing system does not require expensive, bulky setup and pre-treatment of samples, it has a great potential for practical applications including on-site measurements.
Keyphrases
  • fatty acid
  • atomic force microscopy
  • lactic acid
  • climate change
  • high resolution
  • gas chromatography
  • mass spectrometry
  • heavy metals
  • single cell
  • single molecule
  • high density
  • replacement therapy
  • liquid chromatography