scholarly journals Determination of Enantiomeric Excess by Solid-Phase Extraction Using a Chiral Metal-Organic Framework as Sorbent

Molecules ◽  
2018 ◽  
Vol 23 (11) ◽  
pp. 2802
Author(s):  
Jun-Hui Zhang ◽  
Bo Tang ◽  
Sheng-Ming Xie ◽  
Bang-Jin Wang ◽  
Mei Zhang ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Solid Phase ◽  
Metal Organic Framework ◽  
Enantiomeric Excess ◽  
Average Error ◽  
Phase Extraction ◽  
Experimental Conditions ◽  
Standard Curve ◽  
Metal Organic

Metal-organic frameworks (MOFs) have recently attracted considerable attention because of their fascinating structures and intriguing potential applications in diverse areas. In this study, we developed a novel method for determination of enantiomeric excess (ee) of (±)-1,1′-bi-2-naphthol by solid-phase extraction (SPE) using a chiral MOF, [Co(l-tyr)]n(l-tyrCo), as sorbent. After optimization of the experimental conditions, a good linear relationship between the ee and the absorbance of the eluate (R2 = 0.9984) was obtained and the standard curve was established at the concentration of 3 mmol L−1. The ee values of (±)-1,1′-bi-2-naphthol samples can be rapidly calculated using the standard curve after determination of the absorbance of the eluate. The method showed good accuracy, with an average error of 2.26%, and is promising for ee analysis.

Metal–organic framework based micro solid phase extraction coupled with supramolecular solvent microextraction to determine copper in water and food samples

2018 ◽  
Vol 42 (8) ◽  
pp. 5806-5813 ◽  
Author(s):  
Rohullah Kashanaki ◽  
Homeira Ebrahimzadeh ◽  
Morteza Moradi
Keyword(s):  
Solid Phase Extraction ◽  
Solid Phase ◽  
Metal Organic Framework ◽  
Food Samples ◽  
Phase Extraction ◽  
Real Samples ◽  
Supramolecular Solvent ◽  
Metal Organic ◽  
Determination Of Copper

D-μ-SPE-SUPRAS-ME followed by GFAAS was successfully used for preconcentration and determination of copper in real samples.

Dispersive solid-phase extraction using the metal–organic framework MIL-101(Cr) for determination of benzo(a)pyrene in edible oil

2019 ◽  
Vol 11 (27) ◽  
pp. 3467-3473 ◽  
Author(s):  
Zhiyang Lv ◽  
Cheng Yang ◽  
Yuehong Pang ◽  
Weiying Xie ◽  
Xiaofang Shen
Keyword(s):  
Solid Phase Extraction ◽  
High Efficiency ◽  
Solid Phase ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Edible Oil ◽  
Phase Extraction ◽  
Dispersive Solid Phase Extraction ◽  
Metal Organic

Metal–organic frameworks MIL-101(Cr) has high efficiency for dispersive solid-phase extraction of benzo(a)pyrene in edible oil by π–π interaction and size effect.

scholarly journals Chromium-based metal organic framework for pipette tip micro-solid phase extraction: an effective approach for determination of methyl and propyl parabens in wastewater and shampoo samples

BMC Chemistry ◽  
2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Massoud Kaykhaii ◽  
Sayyed Hossein Hashemi ◽  
Fariba Andarz ◽  
Amin Piri ◽  
Ghasem Sargazi ◽  
...  
Keyword(s):  
Detection Limit ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Metal Organic Framework ◽  
Phase Extraction ◽  
Propyl Paraben ◽  
Metal Organic ◽  
Pipette Tip ◽  
Organic Framework

Abstract Background A chromium-based metal organic framework was synthesized and employed as an efficient sorbent for pipette tip micro-solid phase extraction and preconcentration of parabens from wastewater and shampoo samples up to sub-ppb level before their spectrophotometric analysis. Results Factors affecting preconcentration including volume and type of solvent, amount of sorbent, number of extraction, and volume and pH of samples were optimized employing one-variable-at-a-time and response surface methodology. Obtained analytical characteristics of the method proves its usefulness for analysis of real samples. Linear range of the method for parabens was 1.0–200.0 μg/L. Detection limit of the protocol was 0.24 µg/L for propyl paraben and 0.25 µg/L for methyl paraben. Reproducibility of the protocol defined as % RSD was better than 5.78%. Synthesized adsorbent can be re-used for at least 20 extractions. Conclusion The method showed a good detection limit and precision for determination of methyl- and propyl-paraben in wastewater and shampoo samples.

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