Artículos de revistas
Determination of Linear Response in the Detection of Aroma Compounds by Atmospheric Pressure Ionization−Mass Spectrometry (API-MS)
Fecha
2005-02Registro en:
Buffo, Roberto Americo; Zehentbauer, Gerhard; Reineccius, Gary A; Determination of Linear Response in the Detection of Aroma Compounds by Atmospheric Pressure Ionization−Mass Spectrometry (API-MS); American Chemical Society; Journal of Agricultural and Food Chemistry; 53; 3; 2-2005; 702-707
0021-8561
CONICET Digital
CONICET
Autor
Buffo, Roberto Americo
Zehentbauer, Gerhard
Reineccius, Gary A
Resumen
Linearity and detection thresholds of atmospheric pressure ionization−mass spectrometry (API-MS) were determined for 11 aroma compounds in air at concentrations ranging from 50 ppb to ∼450 ppm (moles of volatile per mole of air). In most cases, the protonated molecular ion (i.e., m/z = M + 1) was the base peak throughout the range; however, some compounds showed an increase in fragmentation at lower concentrations. Detection limits varied greatly (from 50 ppb to 14 ppm) depending upon the aroma compound being measured. The linear range was also strongly dependent upon the aroma compound, with values ranging from <10-fold change in concentration to >4000-fold change in concentration depending upon the volatile being studied. The two volatiles with poor detection thresholds also exhibited the smallest linear range. Most compounds had linear ranges of >200. There was no apparent relationship between gas-phase basicity and either detection limit or linear range.