Performance of metal-organic framework as an excellent sorbent for highly efficient and sensitive trace determination of anthracene in water and food samples

2020 ◽  
Author(s):  
Rouhollah Khani ◽  
Maryam Ghalibafan ◽  
Alireza Farrokhi
Keyword(s):  
Metal Organic Framework ◽  
Food Samples ◽  
Trace Determination ◽  
Highly Efficient ◽  
Metal Organic ◽  
Organic Framework

Synthesis and application of a novel magnetic metal-organic framework nanocomposite for determination of Cd, Pb, and Zn in baby food samples

2015 ◽  
Vol 93 (5) ◽  
pp. 518-525 ◽  
Author(s):  
Ebrahim Ghorbani-Kalhor ◽  
Rahim Hosseinzadeh-Khanmiri ◽  
Mirzaagha Babazadeh ◽  
Jafar Abolhasani ◽  
Akbar Hassanpour
Keyword(s):  
Metal Organic Framework ◽  
Food Samples ◽  
Baby Food ◽  
Elution Time ◽  
Magnetic Sorbent ◽  
Magnetic Metal ◽  
Metal Organic ◽  
Sorption Time ◽  
Organic Framework

This work describes the synthesis and application of a novel magnetic metal-organic framework (MOF) [(Fe3O4-2,5-dimercapto-1,3,4-thiadiazole)/Cu3(benzene-1,3,5-tricarboxylate)2] to preconcentrate trace amounts of Cd(II), Pb(II), and Zn(II) ions. A Box–Behnken design was used to find the parameters affecting the preconcentration procedure through response surface methodology. Three variables including sorption time, amount of the magnetic sorbent, and sample pH were selected as affecting factors in the sorption step, and four parameters including type, volume, concentration of the eluent, and elution time were selected in the elution step for the optimization study. These values were 33 mg, 11 min, 5.7 EDTA, 4.3 mL, 0.64 mol L–l EDTA solution, 16 min, for amount of the magnetic sorbent, sorption time, sample pH, type, volume, and concentration of the eluent, and elution time, respectively. Following the sorption and elution steps, the ions were quantified by FAAS. The limits of detection were 0.10, 0.15, and 0.75 ng mL−1 for Cd(II), Zn(II), and Pb(II) ions, respectively. The relative standard deviations (RSD) of the method were less than 8.3% for five separate batch experiments in the determination of 25 μg L−1 of Cd(II), Zn(II), and Pb(II) ions. The sorption capacity of the magnetic MOF nanocomposite was 155 mg g−1 for Cd(II), 173 mg g−1 for Pb(II), and 190 mg g−1 for Zn(II). Finally, the magnetic MOF nanocomposite was successfully applied to rapidly extract trace amounts of heavy metal ions in baby food samples.

A metal-organic framework/aptamer system as a fluorescent biosensor for determination of aflatoxin B1 in food samples

Talanta ◽  
2020 ◽  
Vol 219 ◽  
pp. 121342 ◽  
Author(s):  
Yongmei Jia ◽  
Guohua Zhou ◽  
Xudong Wang ◽  
Yingzi Zhang ◽  
Zhiguo Li ◽  
...  
Keyword(s):  
Aflatoxin B1 ◽  
Metal Organic Framework ◽  
Food Samples ◽  
Fluorescent Biosensor ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Cobalt metal–organic framework-based ZIF-67 for the trace determination of herbicide molinate by ion mobility spectrometry: investigation of different morphologies

RSC Advances ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 2643-2655
Author(s):  
Mehdi Davoodi ◽  
Fatemeh Davar ◽  
Mohammad R. Rezayat ◽  
Mohammad T. Jafari ◽  
Ahmed Esmail Shalan
Keyword(s):  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Metal Organic Framework ◽  
Cobalt Metal ◽  
Trace Determination ◽  
Zeolitic Imidazolate Frameworks ◽  
Reaction Conditions ◽  
Metal Organic ◽  
Organic Framework

Co-MOF-based zeolitic imidazolate frameworks (ZIF-67) with various morphologies were prepared via an innovative way under distinct reaction conditions.

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