Molecular complex based dispersive liquid–liquid microextraction for simultaneous HPLC determination of eight phenolic compounds in water samples

Novel tributyl phosphate-based hydrophobic deep eutectic solvent: application in simultaneous liquid–liquid microextraction of parabens and their metabolite in surface water samples

“…These results were consistent with the extraction efficiency of the extraction solvents discussed in section 3.1, which further proved the described extraction mechanism. 33,34 The 1 H NMR spectra of TBP-M DES at TBP/M ratio of 1 : 2 (DES-4) and its components (TBP and M) in Fig. 3 showed that all of the peaks corresponded to the initial components of DES-4, which confirmed the formulation of DES via hydrogen bonds rather than chemical bonds.…”

“…These results were consistent with the extraction efficiency of the extraction solvents discussed in section 3.1, which further proved the described extraction mechanism. 33,34…”

“…[30][31][32][33] However, this preferred extractant suffers from high viscosity and poor chromatographic behavior, as well as poor extraction capacity for weakly polar and non-polar compounds, which limit its application in analytical chemistry. [34][35][36] D,L-Menthol (M) is a kind of natural perfume which can be extracted from Mentha species. Beyond its abundance and low cost, M is a preferred candidate as HBD because of the existence of hydroxyl hydrogen.…”

Spectrophotometric determination of phenol impurity in phenoxyethanol and phenol index of drinking water and municipal wastewater effluent after salting-out assisted liquid phase microextraction (SA-LPME)

“… Extraction method LOD (ng mL −1 ) RSD (%) EF Ref. Salting out and vortex-assisted dispersive liquid-liquid microextraction based on solidification of floating organic drop microextraction 0.06 3.7 165 [ 23 ] Salting out liquid-liquid extraction (SALLE) combined with dispersive liquid-liquid microextraction (DLLME) 0.15 4.8 to 7.2 78.12 to 82.53 [ 38 ] Dispersive liquid-liquid microextraction (DLLME) 0.18 6 (n = 7) 920 [ 17 ] Dispersive liquid-liquid microextraction combined with microvolume spectrophotometry 0.8 5.2 (n = 6) 700 [ 39 ] Dispersive liquid-liquid microextraction coupled with the pressure-assisted electrokinetic injection 0.13 5.12 (n = 5) 61 [ 40 ] Combination of dispersive liquid-liquid microextraction and smartphone-based colorimetric system 1.7 1.2 (n = 8) 33.3 [ 5 ] Dispersive liquid-liquid microextraction based on terpineol-based hydrophobic deep eutectic solvent 0.38 5.4 (n = 6) 27 [ 19 ] Molecular complex-based dispersive liquid-liquid microextraction 3.71 <9.1 – [ 41 ] Liquid-phase microextraction …”

Dispersive liquid‐liquid microextraction based on a new hydrophobic deep eutectic solvent for the determination of phenolic compounds in environmental water samples

“…Therefore, it is particularly important to establish an efficient, fast, accurate, and environmental friendly analysis method for the phenols [24]. At present, a variety of methods for analysis of phenols have been reported, such as LLE [25], SPE [26,27], SPME [28], and LPME [13,15,29–35] coupled with HPLC‐UV [13,15,36,37], LC‐MS [33], CE‐UV [27,37], GC‐FID [31], GC‐MS [34,35], or electrochemical methods‐localized surface plasmon resonance/fluorescence [38,39]. Among them, several DESs‐based DLLME methods have been used for the determination of phenolic chemicals in environmental water, human milk, and vegetable oils [15,32, 33].…”