Dual-template imprinted polymers for class-selective solid-phase extraction of seventeen triazine herbicides and metabolites in agro-products

Fabrication and application of a MIL-68(In)–NH2 incorporated high internal phase emulsion polymeric monolith as a solid phase extraction adsorbent in triazine herbicide residue analysis

“…[4][5][6][7][8][9][10] Among various sample preparation, solid phase extraction (SPE) is the most widely used extraction technique for extracting triazine herbicides from water samples because of its advantages of high recovery, high enrichment factor, low solvent consumption, and short extraction time. [2][3][4][5][6] As a result, various SPE adsorbents, including oxidized single-walled carbon nanohorns, 2 triazine rings-containing porous aromatic frameworks, 3 poly(high internal phase emulsions) (polyHIPEs), 5,6 molecular imprinted polymers, 4,11,12 carbazole-based porous organic polymers, 13 hydrazone-based covalent triazine polymers, 14 and metalorganic frameworks (MOFs) [15][16][17][18] have been fabricated and applied in the SPE of triazine herbicides in environmental samples. Among these SPE adsorbents, MOFs were possessed of high adsorption and separation performance, owing to their remarkable merits like large surface area, adjustable pore size, diverse structures, as well as great chemical and thermal stability.…”

Sample Preparation Using Molecularly Imprinted Polymers

“…[82][83][84][85] To improve the ability of the polymer to selectively trap as many structural analogs as possible, a mixture of two templates was reported for the trapping of four plant growth regulators, 86 six phthalate esters 33 or seventeen triazines. 87 A mixture of two target molecules was also used as template for their simultaneous extraction from real samples. 61,65,88 The complete removal of the template molecules from the MIP is difficult to achieve and necessitates extensive washing steps with large volumes of organic solvents in basic or acidic conditions.…”

Analytical methods to analyze pesticides and herbicides

“…A linear range of 0.5-200 μg/L was proven, with the reproducibility between 2.6% and 6.8%. Wang, She, et al (2019) prepared a novel dual-template molecularly imprinted polymer (DMIP) for solid-phase extraction (SPE) of triazine herbicides and metabolites. Under the optimum conditions, DMIP-SPE had excellent extraction performance for the target analytes.…”