Packed hybrids of gold nanoparticles and halloysite nanotubes for dispersive solid phase extraction of triazine herbicides, and their subsequent determination by HPLC

2019 ◽  
Vol 186 (8) ◽  
Author(s):  
Zucheng Qin ◽  
Yanxiao Jiang ◽  
Huilan Piao ◽  
Shuo Tao ◽  
Ying Sun ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Halloysite Nanotubes ◽  
Phase Extraction ◽  
Triazine Herbicides ◽  
Dispersive Solid Phase Extraction ◽  
Subsequent Determination

scholarly journals Application of dissolvable Mg/Al layered double hydroxides as an adsorbent for the dispersive solid phase extraction of gold nanoparticles prior to their determination by atomic absorption spectrometry

2020 ◽  
Vol 12 (3) ◽  
pp. 368-375
Author(s):  
Tatiana G. Choleva ◽  
Dimosthenis L. Giokas
Keyword(s):  
Gold Nanoparticles ◽  
Solid Phase Extraction ◽  
Layered Double Hydroxides ◽  
Metallic Nanoparticles ◽  
Solid Phase ◽  
Absorption Spectrometry ◽  
Phase Extraction ◽  
Dispersive Solid Phase Extraction ◽  
Double Hydroxides ◽  
First Time

In this work, dissolvable layered double hydroxides (LDHs) were used for the first time for the extraction and preconcentration of metallic nanoparticles from water samples.

scholarly journals Development of Surface Molecularly Imprinted Polymers as Dispersive Solid Phase Extraction Coupled with HPLC Method for the Removal and Detection of Griseofulvin in Surface Water

2019 ◽  
Vol 17 (1) ◽  
pp. 134 ◽  
Author(s):  
Kamran Bashir ◽  
Zhimin Luo ◽  
Guoning Chen ◽  
Hua Shu ◽  
Xia Cui ◽  
...  
Keyword(s):  
Surface Water ◽  
Solid Phase Extraction ◽  
Molecularly Imprinted Polymers ◽  
Water Samples ◽  
Solid Phase ◽  
Phase Extraction ◽  
Dispersive Solid Phase Extraction ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Surface Water Samples

Griseofulvin (GSF) is clinically employed to treat fungal infections in humans and animals. GSF was detected in surface waters as a pharmaceutical pollutant. GSF detection as an anthropogenic pollutant is considered as a possible source of drug resistance and risk factor in ecosystem. To address this concern, a new extraction and enrichment method was developed. GSF-surface molecularly imprinted polymers (GSF-SMIPs) were prepared and applied as solid phase extraction (SPE) sorbent. A dispersive solid phase extraction (DSPE) method was designed and combined with HPLC for the analysis of GSF in surface water samples. The performance of GSF-SMIPs was assessed for its potential to remove GSF from water samples. The factors affecting the removal efficiency such as sample pH and ionic strength were investigated and optimized. The DSPE conditions such as the amount of GSF-SMIPs, the extraction time, the type and volume of desorption solvents were also optimized. The established method is linear over the range of 0.1–100 µg/mL. The limits of detection and quantification were 0.01 and 0.03 µg/mL respectively. Good recoveries (91.6–98.8%) were achieved after DSPE. The intra-day and inter-day relative standard deviations were 0.8 and 4.3% respectively. The SMIPs demonstrated good removal efficiency (91.6%) as compared to powder activated carbon (67.7%). Moreover, the SMIPs can be reused 10 times for water samples. This is an additional advantage over single-use activated carbon and other commercial sorbents. This study provides a specific and sensitive method for the selective extraction and detection of GSF in surface water samples.

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