Influence of Particle Coating and Matrix Constituents on the Cloud Point Extraction Efficiency of Silver Nanoparticles (Ag-NPs) and Application for Monitoring the Formation of Ag-NPs from Ag+

2013 ◽  
Vol 86 (1) ◽  
pp. 790-796 ◽  
Author(s):  
Georg Hartmann ◽  
Tanja Baumgartner ◽  
Michael Schuster
Keyword(s):  
Silver Nanoparticles ◽  
Cloud Point ◽  
Extraction Efficiency ◽  
Cloud Point Extraction ◽  
Ag Nps ◽  
Particle Coating

scholarly journals Determination of Antidepressants in Human Plasma by Modified Cloud-Point Extraction Coupled with Mass Spectrometry

2020 ◽  
Vol 13 (12) ◽  
pp. 458
Author(s):  
Elżbieta Gniazdowska ◽  
Natalia Korytowska ◽  
Grzegorz Kłudka ◽  
Joanna Giebułtowicz
Keyword(s):  
Mass Spectrometry ◽  
Simultaneous Determination ◽  
Human Plasma ◽  
Cloud Point ◽  
Extraction Efficiency ◽  
Cloud Point Extraction ◽  
Limiting Factor ◽  
Drug Determination ◽  
Triton X

Cloud-point extraction (CPE) is rarely combined with liquid chromatography coupled to mass spectrometry (LC–MS) in drug determination due to the matrix effect (ME). However, we have recently shown that ME is not a limiting factor in CPE. Low extraction efficiency may be improved by salt addition, but none of the salts used in CPE are suitable for LC–MS. It is the first time that the influences of a volatile salt—ammonium acetate (AA)—on the CPE extraction efficiency and ME have been studied. Our modification of CPE included also the use of ethanol instead of acetonitrile to reduce the sample viscosity and make the method more environmentally friendly. We developed and validated CPE–LC–MS for the simultaneous determination of 21 antidepressants in plasma that can be useful for clinical and forensic toxicology. The selected parameters included Triton X-114 concentration (1.5 and 6%, w/v), concentration of AA (0, 10, 20 and 30%, w/v), and pH (3.5, 6.8 and 10.2). The addition of 10% of AA increased recovery twice. For 20 and 30% (w/v) of AA, three phases were formed that prolonged the extraction process. The developed CPE method (6% Triton X-114, 10% AA, pH 10.2) was successfully validated through LC–MS/MS simultaneous determination of 21 antidepressants in human plasma. The linearity was in the range of 10–750 ng/mL (r2 > 0.990).

Determination of very low amounts of free copper and nickel ions in beverages and water samples using cloud point extraction assisted by silver nanoparticles

2015 ◽  
Vol 7 (9) ◽  
pp. 3786-3792 ◽  
Author(s):  
Ignacio López-García ◽  
Yesica Vicente-Martínez ◽  
Manuel Hernández-Córdoba
Keyword(s):  
Silver Nanoparticles ◽  
Cloud Point ◽  
Water Samples ◽  
Cloud Point Extraction ◽  
Rich Phase ◽  
Nickel Ions

Silver nanoparticles act as carriers in the transfer of copper and nickel ions to the surfactant-rich phase obtained in a CPE process.

scholarly journals Cloud Point Extraction as an Advantageous Preconcentration Approach for Analysis of Trace Silver Nanoparticles in Environmental Waters

2009 ◽  
Vol 81 (15) ◽  
pp. 6496-6502 ◽  
Author(s):  
Jing-fu Liu ◽  
Jing-bo Chao ◽  
Rui Liu ◽  
Zhi-qiang Tan ◽  
Yong-guang Yin ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Cloud Point ◽  
Cloud Point Extraction ◽  
Environmental Waters

scholarly journals Cloud Point Extraction with Liquid Ion Exchange for Separation and Determination Magnesium (II) as anion

2021 ◽  
pp. 20-33
Author(s):  
Faris Hameed ◽  
Shawket K. Jawad
Keyword(s):  
Aqueous Solution ◽  
Ion Exchange ◽  
Cloud Point ◽  
Extraction Efficiency ◽  
Cloud Point Extraction ◽  
Basic Medium ◽  
Optimum Conditions ◽  
Suitable Temperature ◽  
Hydroxy Quinoline ◽  
Small Aggregation

Liquid Ion Exchange joined with Cloud point extraction methodology was used for the separation of Magnesium (II) from aqueous and determine whereas 10 mL aqueous solution that contains 50 µg Mg2+ ion is complex with 1×10-3M 8-Hydroxy quinoline (8-HQ) at a suitable basic medium it well give higher extraction efficiency at optimum conditions, needs heating the aqueous solution in suitable temperature degree for enough time to form a cloud point layer (CPL). Therefore, the optimum conditions that yielded the good CPL have a small aggregation volume which is appropriate for continuing the ion pair association Complex between Magnesium ion and 8-Hydroxy quinoline.

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