Identification and detection of bioactive compounds in turmeric ( L.) using a gas sensor array based on molecularly imprinted polymer quartz crystal microbalance
Four bioactive compounds in turmeric ( Curcuma longa L.) have been identified using a gas sensor array based on a molecularly imprinted polymer-quartz crystal microbalance (MIP-QCM). Four QCM sensors coated with MIPs were used to analyse the performance of the array sensor toward target compounds, n...
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Veröffentlicht in: | New journal of chemistry 2021-10, Vol.45 (38), p.1793-1794 |
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Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Four bioactive compounds in turmeric (
Curcuma longa
L.) have been identified using a gas sensor array based on a molecularly imprinted polymer-quartz crystal microbalance (MIP-QCM). Four QCM sensors coated with MIPs were used to analyse the performance of the array sensor toward target compounds, namely ar-turmerone, curlone, ethyl-
p
-methoxycinnamate and, tumerone, at different concentrations. In this experiment, nine samples of
Curcuma longa
odour (CL
1
, CL
2
, CL
3
, CL
4
, CL
5
, CL
6
, CL
7
, CL
8
, and CL
9
) were exposed in a MIP-QCM sensor chamber. These analytes have been previously examined using gas chromatography-mass spectroscopy (GC-MS) to ensure the presence of the target compounds. GC-MS chromatograms indicated that the concentrations of the target compounds in nine analytes were distinct. The frequency change in the response due to the adsorption of the target compound with the selective layer coated on the QCM sensor was used as the sensor response. The performance of the MIP-QCM sensor array exhibited a higher response and better sensitivity and selectivity to turmeric odour with a high concentration of target compounds (CL
1
, CL
2
, CL
3
, CL
4
, CL
5
and CL
6
) than the turmeric odour dominated by non-target compounds (CL
7
, CL
8
and CL
9
). Principal component analysis (PCA) and backpropagation neural network (BPNN) were employed to analyse the sensor responses. The visualisation of the PCA score plot shows that the MIP-QCM array sensor performed highly in distinguishing the turmeric odour based on the composition of target compounds. The BPNN classifier reached an accuracy of 98.41% and 96.29% for categorising the samples using training data sets and testing data sets, respectively.
Four bioactive compounds in turmeric (
Curcuma longa
L.) have been identified using a gas sensor array based on a molecularly imprinted polymer-quartz crystal microbalance (MIP-QCM). |
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ISSN: | 1144-0546 1369-9261 |
DOI: | 10.1039/d1nj03640h |