Method Validation for Multi-Pesticide Residue Determination in Chrysanthemum

Abstract

The chrysanthemum can be consumed in various forms, representing the “integration of medicine and food”. Quantitative analysis of multi-pesticide residues in chrysanthemum matrices is therefore crucial for both product-safety assurance and consumer-risk evaluation. In the present study, a simple and effective method was developed for simultaneously detecting 15 pesticides frequently used in chrysanthemum cultivation in three matrices, including fresh flowers, dry chrysanthemum tea, and infusions. The calibration curves for the pesticides were linear in the 0.01–1 mg kg−1 range, with correlation coefficients greater than 0.99. The limits of quantification (LOQs) for fresh flowers, dry chrysanthemum tea, and infusions were 0.01–0.05 mg kg−1, 0.05 mg kg−1, and 0.001–0.005 mg L−1, respectively. In all selected matrices, satisfactory accuracy and precision were achieved, with recoveries ranging from 75.7 to 118.2% and relative standard deviations (RSDs) less than 20%. The validated method was then used to routinely monitor pesticide residues in 50 commercial chrysanthemum-tea samples. As a result, 56% of samples were detected with 5–13 pesticides. This research presents a method for the efficient analysis of multi-pesticide residues in chrysanthemum matrices.

Constructing graphene oxide/Au nanoparticle cellulose membranes for SERS detection of mixed pesticide residues in edible chrysanthemum

“…To cope with these challenges, pesticides have been extensively used in the cultivation of chrysanthemum. 9 However, with the widespread application of pesticides, excessive exposure of pesticide residues has gradually become a major concern. 10 In a recent study, as many as 352 pesticide residues have been identified in edible chrysanthemum using gas chromatography tandem mass spectrometry (GC-MS), including organophosphorus pesticides fenthion, phoxim and isocarbophos.…”

First‐principles studies on physical properties for new half‐metallic perovskites AFeO3 (A = Ca, Sr, Ba): Spintronics and energy harvesting applications

“…It can be observed in many studies that magnetic element replacement of B cation surprisingly invokes multi‐ferroic and magneto‐electric effects in materials. For the last few decades, it has drawn the attention of researchers [4–7]. The structures like the perovskite family with transition metals (TMs) oxides reveals astonishing electronic characteristics for Mott insulators, metal insulators, and superconductors with extraordinary critical temperature due to increasing transportation in electrons of strongly coupled d‐states [8–11].…”