Screening pesticide residues on fruit peels using portable Raman spectrometer combined with adhesive tape sampling.
Food Chem
; 295: 254-258, 2019 Oct 15.
Article
in En
| MEDLINE
| ID: mdl-31174756
ABSTRACT
In this work, we report a simple and rapid surface-enhanced Raman scattering (SERS) method for the screening of pesticide residues on fruit peels using a portable Raman spectrometer. Adhesive tapes were used as the sampling media; the effectiveness of different tape brands was examined. Collection efficiencies were found to be 60.2⯱â¯7.6%, 54.3⯱â¯5.0%, and 52.3⯱â¯9.0% on glass, aluminum foil, and fruit peels, respectively. SERS was achieved by applying silver nanoparticles (Ag NPs) to the surface of the tape after analyte collection. Preparation of the Ag NPs was optimized for pesticide detection. The limit of detection of triazophos on apple peels was 25â¯ng/cm2 with the portable Raman spectrometer. Considering the least favorable conditions, the calculated detection limit was 0.0225â¯mg/kg, which is an order of magnitude less than the maximum residue limit (MRL, 0.2â¯mg/kg) in China. The method is sufficiently sensitive for use in field analysis.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Spectrum Analysis, Raman
/
Pesticide Residues
/
Food Contamination
/
Fruit
Type of study:
Diagnostic_studies
/
Screening_studies
Country/Region as subject:
Asia
Language:
En
Journal:
Food Chem
Year:
2019
Type:
Article
Affiliation country:
China