Experimental and Theoretical Studies of Glyphosate Detection in Water by an Europium Luminescent Complex and Effective Adsorption by HKUST‑1 and IRMOF‑3

• Published in: Journal of agricultural and food chemistry 2020-09, Vol.68 (36), p.9664-9672
• Main Authors: Galaço, Ayla R. B. S, Jesus, Larissa T, Freire, Ricardo O, de Oliveira, Marcos, Serra, Osvaldo A
• Format: Article
• Language: English
• Subjects: Adsorption; Agricultural and Environmental Chemistry; Europium - chemistry; Europium - metabolism; Glycine - analogs & derivatives; Glycine - chemistry; Glycine - metabolism; Glyphosate; Herbicides - chemistry; Herbicides - metabolism; Luminescence; Mass Spectrometry; Metal-Organic Frameworks - chemistry; Organometallic Compounds - chemistry; Water Pollutants - chemistry; Water Pollutants - metabolism
• ISSN: 0021-8561; 1520-5118
• DOI: 10.1021/acs.jafc.0c03574

Designing an effective and simple detection method to quantify glyphosate (GLY) herbicide is desirable. Current chromatography–mass spectrometry and electrochemical methods can be used for this purpose, but these methods are difficult to be made portable and need high-cost equipment. Here, we evaluate a luminescent β-diketonate–Eu–ethylenediaminetetraacetic acid complex for GLY quantification in aqueous media on the basis of the luminescent quenching process. This complex successfully measured GLY at concentrations ranging from 5 × 10–7 to 10–5 mol L–1. Theoretical methods (LUMPAC) are also performed to identify the complex most probable structure in solution. We also demonstrate that the metal–organic frameworks HKUST-1 and IRMOF-3, easily synthesized, effectively adsorb GLY in water in about 30 min of contact.