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

2022 ◽  
Vol 371 ◽  
pp. 131090
Author(s):  
Quanbin Fu ◽  
Bingbing Sun ◽  
Jun Fan ◽  
Minglin Wang ◽  
Xin Sun ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Mixed Matrix

The Use of Piezosensors for Determination of Carboxylic Acids in the Intermediate Products of Edible Ethanol Production

2020 ◽  
Vol 56 (14) ◽  
pp. 1379-1383
Author(s):  
Cao Nhat Linh ◽  
O. V. Duvanova ◽  
S. Yu. Nikitina ◽  
A. N. Zyablov
Keyword(s):  
Ethanol Production ◽  
Carboxylic Acids ◽  
Intermediate Products

scholarly journals Expert System for Catalytic Titrimetry—Part 2: Determination of Monobasic Carboxylic Acids

1998 ◽  
Vol 81 (5) ◽  
pp. 1077-1086
Author(s):  
Biljana F Abramovic ◽  
Borislav K Abramovic ◽  
Ferenc F Gaál ◽  
Danilo M Obradovtc
Keyword(s):  
Expert System ◽  
Carboxylic Acids ◽  
Selective Determination

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

Solubilization of Amphiphilic Carboxylic Acids in Nonionic Micelles:  Determination of Partition Coefficients from pKaMeasurements and NMR Experiments

Langmuir ◽  
2007 ◽  
Vol 23 (21) ◽  
pp. 10463-10470 ◽  
Author(s):  
Laurence Dupont-Leclercq ◽  
Sébastien Giroux ◽  
Bernard Henry ◽  
Patrice Rubini
Keyword(s):  
Carboxylic Acids ◽  
Partition Coefficients

Determination of light carboxylic acids in snow and ice from mountain glaciers

2002 ◽  
Vol 34 (2) ◽  
pp. 127-134 ◽  
Author(s):  
Xinqing Lee ◽  
Dahe Qin ◽  
Hui Zhou ◽  
Guibin Jiang
Keyword(s):  
Carboxylic Acids ◽  
Mountain Glaciers ◽  
Snow And Ice

scholarly journals Comparison of Three Solid Phase Materials for the Extraction of Carboxylic Acids from River Water Followed by 2D GC × GC-TOFMS Determination

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
G. O. Bosire ◽  
J. C. Ngila ◽  
H. Parshotam
Keyword(s):  
Carboxylic Acid ◽  
Carboxylic Acids ◽  
Natural Organic Matter ◽  
Solid Phase ◽  
Cooling Water ◽  
Raw Water ◽  
Aliphatic Carboxylic Acid ◽  
Hydrophobic Nature ◽  
Relationship Of

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.

scholarly journals Determination of higher carboxylic acids in snow samples using solid-phase extraction and LC/MS-TOF

2008 ◽  
Vol 392 (7-8) ◽  
pp. 1459-1470 ◽  
Author(s):  
Matthias Kippenberger ◽  
Richard Winterhalter ◽  
Geert K. Moortgat
Keyword(s):  
Solid Phase Extraction ◽  
Carboxylic Acids ◽  
Solid Phase ◽  
Phase Extraction ◽  
Snow Samples
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