A simple solvothermal process for fabrication of a metal-organic framework with an iron oxide enclosure for the determination of organophosphorus pesticides in biological samples

Zirconium(IV) functionalized magnetic nanocomposites for extraction of organophosphorus pesticides from environmental water samples

“…5d and 5g). Enrichment factor (EF, defined as the ratio of the analyte concentration after extraction to that in the original solution [33]) was used to evaluate the enriching performance of the Fe 3 O 4 -EDTA@Zr(IV) NPs. From Table 5, it can be seen that all four OPPs can be quantified successfully after being treated with the Fe 3 O 4 -EDTA@Zr(IV) NPs.…”

“…1a. Firstly, Fe 3 O 4 -EDTA NPs were prepared using a one-pot chemical co-precipitation method according to previous report with few modification [33]. Briefly …”

Recent Advances in Preparation and Applications of Magnetic Framework Composites

“…Conversely, it is an excellent way to add the MNPs which has been previously formed to the solution containing the inorganic metal ions and organic ligands of the desired MOFs. According to the structure of the MFCs, this idea can be divided into: embedding method, Layer‐by‐Layer (LbL) growth method and encapsulation method . Among them, the LbL method can obtain MFCs having a core–shell structure, and usually can control the size.…”

Recent applications of metal–organic frameworks in sample pretreatment

“…Zhang et al. employed embedding method to fabricate Fe 3 O 4 /MIL‐101 composite by mixing magnetic Fe 3 O 4 particles with FeCl 3 .6H 2 O and H 2 BDC in dimethyl formamide solution. The MOF‐based MSPE in combination with GC was applied to determine OPPs with good precision (1.8–8.7% for intraday, 2.9–9.4% for interday), LODs (0.21–2.28 ng/mL), and satisfactory recoveries (76.8–94.5% for hair sample, 74.9–92.1% for urine sample).…”

“…Subsequently, Lin et al [66] applied magnetic ZIF-67-C as MSPE adsorbent to enrich neonicotinoid insecticides from water and fatmelon samples. Owing to high specific surface area, large pore volume, and superparamagnetism, ZIF-67-C demonstrated excellent adsorption capability with good recoveries to target compounds ( [78] in determination of chlorophenols with satisfactory linearity range (0.5-100.0 ng/mL for water samples; [73], PAHs [74], phosphopeptides [75], and endogenous peptides [71]. Liu et al [76] later employed MAA-Fe 3 O 4 to construct Fe 3 O 4 @ZIF-8 and applied it in MSPE to extract several phthalate esters in water samples.…”