In:
Journal of Separation Science, Wiley, Vol. 43, No. 5 ( 2020-03), p. 929-935
Abstract:
The AOAC 2007.1 quick, easy, cheap, effective, rugged, and safe official method, together with gas chromatography coupled to a triple quadrupole mass spectrometer was applied for the analysis of 38 multiclass pesticides from dried fruits typically cultivated and exported from Colombia: uchuva ( Physalis peruviana ), lulo ( Solanum quitoense ), guanabana ( Anona muricata ), and pitahaya ( Hylocereus undatus ). The whole method was validated in terms of matrix‐matched calibration, matrix effect, and recovery using atrazine‐d 5 as internal standard, triphenylphosphate for quality control of the injection, and a proper mixture of analytes protectants. Matrix‐matched calibration data were found satisfactory for all pesticides and dried fruits, reporting R 2 values above 0.99. Matrix effect values evidenced the existence of such effect in most cases. The applied procedure gave satisfactory recovery percentages (70–120%) and relative standard deviation values ( 〈 20%) for 92% of the 456 combinations pesticide/fruit studied (spiked levels of 25, 200, and 400 µg/kg). Finally, 20 real dried fruit samples were analyzed and residues of tebuconazole were found in two samples of uchuva at a concentration below the lowest calibration level of the method for one of them and at 10.8 ± 1.6 µg/kg for the other, being below or similar to the general maximum residue level established for monitoring purposes in food applications.
Type of Medium:
Online Resource
ISSN:
1615-9306
,
1615-9314
DOI:
10.1002/jssc.201900698
Language:
English
Publisher:
Wiley
Publication Date:
2020
detail.hit.zdb_id:
2047990-6
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