Template-directed synthesis of zeolitic imidazolate framework-8 derived Zn–Al layered double oxides decorated on the electrochemically anodized nanoporous aluminum substrate for thin film microextraction of chlorophenols followed by determination with high-performance liquid chromatography

2021 ◽  
pp. 462550
Author(s):  
Milad Ghani ◽  
Jahan Bakhsh Raoof ◽  
Saeed Masoum
Keyword(s):  
Thin Film ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Aluminum Substrate ◽  
Zeolitic Imidazolate Framework ◽  
Directed Synthesis

In situ growth of zeolitic imidazolate framework-8 on a GO–PVDF membrane as a sorbent for thin-film microextraction of caffeine followed by quantitation through high-performance liquid chromatography

2020 ◽  
Vol 12 (13) ◽  
pp. 1736-1743 ◽  
Author(s):  
Zahra Jafari ◽  
Mohammad Reza Hadjmohammadi
Keyword(s):  
Thin Film ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
In Situ Growth ◽  
Zeolitic Imidazolate Framework ◽  
Pvdf Membrane

In the present study, the applicability of ZIF-8/LDH/GO/PVDF as a sorbent for the thin film microextraction (TFME) method is introduced.

scholarly journals Facile Fabrication of Diatomite-Supported ZIF-8 Composite for Solid-Phase Extraction of Benzodiazepines in Urine Samples Prior to High-Performance Liquid Chromatography

Molecules ◽  
2021 ◽  
Vol 26 (17) ◽  
pp. 5209
Author(s):  
Li Du ◽  
Shaonan Xu ◽  
Han Wu ◽  
Tengwen Zhao ◽  
Xuesheng Wang ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Solid Phase Extraction ◽  
High Performance ◽  
Solid Phase ◽  
Enrichment Factors ◽  
Phase Extraction ◽  
Zeolitic Imidazolate Framework ◽  
Facile Fabrication ◽  
Sensitive Determination

A novel diatomite-supported zeolitic imidazolate framework-8 sorbent (ZIF-8@Dt-COOH) was in situ fabricated and developed for solid-phase extraction of three benzodiazepines (triazolam, midazolam and diazepam) in urine followed by high-performance liquid chromatography. ZIF-8@Dt-COOH was easily prepared by coating ZIF-8 on the surface of Dt-COOH and characterized by Fourier transform infrared spectra, X-ray powder diffractometry and scanning electron microscopy. Compared with bare Dt-COOH, the extraction efficiency of ZIF-8@Dt-COOH for the target was significantly increased from 20.1–39.0% to 100%. Main extraction parameters, including ionic strength and pH of solution, loading volume, washing solution, elution solvent and elution volume, were optimized in detail. Under optimum conditions, the developed method gave linearity of three BZDs in 2–500 ng/mL (r ≥ 0.9995). Limits of detection (S/N = 3), and limits of quantification (S/N = 10) were 0.3–0.4 ng/mL and 1.0–1.3 ng/mL, respectively. In addition, the average recoveries at three spiked levels (5, 10 and 20 ng/mL) varied from 80.0% to 98.7%, with the intra-day and inter-day precisions of 1.4–5.2% and 1.5–8.2%, respectively. The proposed method provided an effective purification performance and gave the enrichment factors of 24.0–29.6. The proposed method was successfully employed for the accurate and sensitive determination of benzodiazepines in urine.

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