Mixed matrix of MOF@COF hybrids for enrichment and determination of phenoxy carboxylic acids in water and vegetables

2022 ◽  
Vol 371 ◽  
pp. 131090
Quanbin Fu ◽  
Bingbing Sun ◽  
Jun Fan ◽  
Minglin Wang ◽  
Xin Sun ◽  
2020 ◽  
Vol 56 (14) ◽  
pp. 1379-1383
Cao Nhat Linh ◽  
O. V. Duvanova ◽  
S. Yu. Nikitina ◽  
A. N. Zyablov

1998 ◽  
Vol 81 (5) ◽  
pp. 1077-1086
Biljana F Abramovic ◽  
Borislav K Abramovic ◽  
Ferenc F Gaál ◽  
Danilo M Obradovtc

Abstract An expert system (ES) to solve the problem of choosing a catalytic titrimetric procedure for determining monobasic carboxylic acids is described. Carboxylic acids were divided into 3 groups—aliphatic, aromatic, and α-aminocarboxylic acids— based on their behavior in catalytic titrations with different indicator reactions, titrant, and/or solvent and the possibility of their selective determination in the presence of other acids

Langmuir ◽  
2007 ◽  
Vol 23 (21) ◽  
pp. 10463-10470 ◽  
Laurence Dupont-Leclercq ◽  
Sébastien Giroux ◽  
Bernard Henry ◽  
Patrice Rubini

2002 ◽  
Vol 34 (2) ◽  
pp. 127-134 ◽  
Xinqing Lee ◽  
Dahe Qin ◽  
Hui Zhou ◽  
Guibin Jiang

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
G. O. Bosire ◽  
J. C. Ngila ◽  
H. Parshotam

The extraction and determination of aliphatic and aromatic carboxylic acids as well as their influence on the aromaticity and molecularity relationship of natural organic matter (NOM) in water are reported in this study. Three solid phase extraction (SPE) sorbents were used and their extraction efficiencies evaluated after chromatographic determinations (using gas chromatography with a time of flight mass spectrometer (GC × GC-TOFMS) and liquid chromatography with organic carbon detector (LC-OCD)). More than 42 carboxylic acids were identified in raw water from the Vaal River, which feeds the Lethabo Power Generation Station, South Africa, with cooling water. The aromatic carboxylic acid efficiency (28%) was achieved by using Strata™X SPE while the highest aliphatic carboxylic acid efficiency (92.08%) was achieved by silica SPE. The hydrophobic nature of NOM in water depends on the nature of organic compounds in water, whether aromatic or aliphatic. The LC-OCD was used to assess the hydrophobicity levels of NOM as a function of these carboxylic acids in cooling water. The LC-OCD results showed that the aromatic nature of NOM in SPE filtered water followed the order Silica>Strata X>C-18. From the results, the hydrophobicity degree of the samples depended on the type and number of carboxylic acids that were removed by the SPE cartridges.

2008 ◽  
Vol 392 (7-8) ◽  
pp. 1459-1470 ◽  
Matthias Kippenberger ◽  
Richard Winterhalter ◽  
Geert K. Moortgat

Sign in / Sign up

Export Citation Format

Share Document