QCM array for on-line-monitoring of composting procedures.
Six QCM resonators forming a sensor array were coated with different molecularly imprinted polymers for the on-line monitoring of composting procedures. Four key analytes are traced, namely water, 1-propanol, ethyl acetate and limonene. Trendlines obtained on-line by the sensor during measurements in a commercial composter give a distinct pattern: the signal for the alcohols first decreases according to an increase in ethyl acetate concentration, and increases again, when obviously no more acetic acid is formed. Limonene is detected in later stages of composting. Similar trends could also be observed by GC-MS. Additionally, chromatographic and sensor data for limonene could be correlated with each other.
Dickert
Franz L
FL
Institute of Analytical Chemistry, Vienna University, Waehringer Strasse 38, A-1090 Vienna, Austria. Franz.Dickert@univie.ac.at
Lieberzeit
Peter A
PA
Achatz
Paul
P
Palfinger
Christian
C
Fassnauer
Michael
M
Schmid
Erich
E
Werther
Wolfgang
W
Horner
Gerd
G
D004563:Electrochemistry; D001330:Electronic Data Processing; D004784:Environmental Monitoring / Q000379:methods; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D005740:Gases / Q000032:analysis; D014159:Transducers; D018505:Waste Management
D005740:Gases