Development of New Detection Schemes Using Colorimetric-Solid Phase Extraction for Formaldehyde and other Trace Organic Contaminants in Water

2005 ◽  
Author(s):  
April A. Hazen-Bosveld ◽  
Robert J. Lipert ◽  
James S. Fritz ◽  
Marc D. Porter
Keyword(s):  
Solid Phase Extraction ◽  
Organic Contaminants ◽  
Solid Phase ◽  
Phase Extraction ◽  
Trace Organic Contaminants ◽  
Detection Schemes ◽  
Trace Organic

scholarly journals Using size-exclusion for improved extraction of trace organic compounds from landfill leachate

2019 ◽  
Vol 37 (6) ◽  
pp. 651-655 ◽  
Author(s):  
Nicole L Kennedy Neth ◽  
Olya S Keen
Keyword(s):  
Solid Phase Extraction ◽  
Small Molecules ◽  
Landfill Leachate ◽  
Organic Contaminants ◽  
Solid Phase ◽  
Size Exclusion ◽  
Phase Extraction ◽  
Trace Organic Contaminants ◽  
Hydrophilic Lipophilic Balance ◽  
Trace Organic

Pharmaceuticals, plasticisers and other trace organic contaminants have been reported in landfill leachates, with most methods using hydrophilic–lipophilic balance cartridges for solid phase extraction. However, leachate has a high organic load and can quickly coat the cartridge media and prevent target compounds from being extracted. There are several solid phase extraction cartridges that offer size exclusion in addition to adsorption, where only small molecules are allowed to diffuse into the resin pores where adsorption in happening. Three cartridges with size exclusion properties were evaluated in comparison with hydrophilic–lipophilic balance cartridges for extraction of several trace organic contaminants spiked into landfill leachate. All three cartridges with size exclusion properties showed some improvement in extraction compared with hydrophilic–lipophilic balance, although the differences were not statistically significant at 95% confidence interval. Nevertheless, media with size-exclusion properties offers a viable alternative to hydrophilic–lipophilic balance for extracting small molecules of trace organics from complex environmental matrices.

Magnetically mixed hemimicelles solid-phase extraction based on ionic liquid-coated Fe3O4 nanoparticles for the analysis of trace organic contaminants in water

2014 ◽  
Vol 6 (17) ◽  
pp. 6783-6788 ◽  
Author(s):  
Sheying Dong ◽  
Guiqi Huang ◽  
Xiaohong Wang ◽  
Qing Hu ◽  
Tinglin Huang
Keyword(s):  
Ionic Liquid ◽  
Magnetic Nanoparticles ◽  
Solid Phase Extraction ◽  
Fe3o4 Nanoparticles ◽  
Organic Contaminants ◽  
Solid Phase ◽  
Phase Extraction ◽  
Trace Organic Contaminants ◽  
Mixed Hemimicelles ◽  
Trace Organic

Magnetically mixed hemimicelles formed by ionic liquid-coated Fe3O4 magnetic nanoparticles (IL-coated Fe3O4 NPs) as an adsorbent of solid-phase extraction are proposed for the preconcentration of five organic contaminants.

A larval medaka (Oryzias latipes) acute toxicity assay combined with solid-phase extraction to efficiently determine the toxicity of organic contaminants in river water

2006 ◽  
Vol 53 (11) ◽  
pp. 213-219 ◽  
Author(s):  
R. Liu ◽  
T. Kameya ◽  
Y. Sugimura ◽  
A. Sawai ◽  
T. Shigeoka ◽  
...  
Keyword(s):  
Acute Toxicity ◽  
Solid Phase Extraction ◽  
River Water ◽  
Organic Contaminants ◽  
Solid Phase ◽  
Oryzias Latipes ◽  
Phase Extraction ◽  
Toxicity Assay ◽  
Lower Toxicity ◽  
Toxicity Level

Using a larval medaka (Oryzias latipes) acute toxicity assay combined with solid-phase extraction, we proposed a method for efficiently determining the fish toxicity of organic contaminants in river water. Organic toxicants were 10, 20, 50 and 100-fold concentrated from 4 L of the sample with adsorption cartridges. The lethal effect was observed by exposing every ten individuals of 48–72 h old larval medaka to 20 mL of each solution for 48 h. The median lethal concentration rate (LCR50) was used as an indicator for the toxicity. With the developed toxicity test method, more than seven times difference was found in the LCR50 of the river water samples. LCR50 distribution profiles were compared with 125 samples in two typical rivers. The result revealed a lower toxicity level in the mainstream than in the confluences, and a lower toxicity level in Sagami River than in Ayase River. LCR50 proved unique as a toxicity indicator, which was impossible to speculate from the conventional water quality indicator of the dissolved organic carbon concentration. As an effective screening test for priority settings, the method can help us with an efficient planning for the environmental investigation and management.

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