Akademik Veri Yönetim Sistemi
XXII European Conference on Analytical Chemistry (EUROANALYSIS 2025), Barcelona, İspanya, 31 Ağustos - 04 Eylül 2025, ss.373, (Özet Bildiri)
Materials with at least one dimension between 1-100 nm are defined as nanomaterials. Nanomaterials exhibit
thermal, mechanical, electronic and biological properties (1). All nanomaterials consisting of carbon atoms are called
carbon-based or carbon nanomaterials (CNMs). Examples of CNMs are nanodiamonds, carbon nanodots (CNDs),
carbon nanotubes, graphene, fullerenes and carbon onions. Synthesis methods of CNMs are divided into two main
groups as top-down and bottom-up approaches. Top-down methods are longer processes that require difficult
reaction conditions and expensive equipment. The pyrolysis method, which is one of the bottom-up methods
proposed in this study, has the advantages of being simple, environmentally friendly, and not using any catalyst or
passivation agent.
Pesticides are chemical substances that have been used for years in agricultural production to prevent, control or
completely eliminate pests and weeds. While careful use of pesticides provides benefits, careless and poor use
leads to accumulation in food, environment and animal resources. In particular, long-term exposure to pesticides
potentially causes weakened immunity, hormonal disorders and drug resistance (2). Trifluralin is a moderately
persistent and toxic dinitroaniline herbicide used to selectively and effectively control many annual grasses and
broadleaf weeds in a wide variety of tree fruit, nut, vegetable and cereal crops (3).
Considering the threatening toxicity and trace residues of pesticides as well as direct exposure to organic pollutants,
the establishment of sensitive and selective analytical strategies for the determination of trifluralin and similar
pesticides is of great importance in terms of environmental, food and human safety regulations. Chromatographic
techniques such as electron capture detection gas chromatography (GC/ECD), gas chromatography with mass
spectrometry (GC/MS), and high-performance liquid chromatography (HPLC) with different detectors used in
the determination of trifluralin are sensitive methods, but they are time-consuming, expensive and require pretreatment.
In contrast, the spectrofluorimetric method used in the proposed study is a short-term, cheap and pretreatment-
free method.
We synthesized new CNM using olive pits by pyrolysis method at 400 °C in 3 hours. In this study, a spectrofluorimetric
method was developed for the determination of trifluralin in real samples of water, carrot and cabbage. The excitation
wavelength is 340 nm and the emission wavelength is 383 nm. The linear range is 0.0-50.0 mg/L. The accuracy of the
developed method was determined by addition/recovery tests in real samples. This method was successfully applied
for the determination of trifluralin in water, carrot and cabbage samples with recovery values of 95-108%, 93-100%
and 95-103%, respectively. In conclusion, the proposed method is a simple, cheap and time-saving method that can
be applied for the determination of trifluralin.
This study was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) under Grant
Number 124Z973. The authors thank TUBITAK for their support.
References:
[1] Scida, K., Stege, P. W., Haby, G., Messina, G. A., García, C. D. 201 “Recent applications of carbon-based nanomaterials in
analytical chemistry: critical review”, Anal Chim Acta., 691(1-2):6-17.
[2] Wu, Y., Jiao, L., Xu, W., Gu, W., Zhu, C., Du, D., Lin, Y. (2019). Polydopamine-capped bimetallic AuPt hydrogels enable robust
biosensor for organophosphorus pesticide detection. Small, 15, e190063doi: 10.1002/smll.201900632.
[3] Lai, Z., Guo, X., Cheng, Z., Ruan, G. ve Du, F. (2020). Green Synthesis of Fluorescent Carbon Dots from Cherry Tomatoes for
Highly Effective Detection of Trifluralin Herbicide in Soil Samples. ChemistrySelect, 5(6), 1956–1960. doi:10.1002/slct.201904517.