Hydrocarbon wastes at petroleum- and creosote-contaminated sites: rapid characterization of component classes by thin-layer chromatography with flame ionization detection

Pollard, Simon J. T.; Hrudey, Steve E.; Fuhr, Bryan J.; Alex, Randy F.; Holloway, L.R.; Tosto, Frank

doi:10.1021/es00036a029

Cited by 43 publications

(28 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The metallic nanoparticles with hydrophobic surfaces could be dispersed in oil phase, but the transfer of the nanoparticles from aqueous to organic phase or preparation of metallic nanoparticle with surfactant is indispensable. TLC is a kind of simple, fast and cost-effective separation technology, which have been successfully used for separating analytes from oil and petroleum samples (Cercaci, Rodriguez-Estrada, & Lercker, 2003; Pollard, et al, 1992). The diatomite base TLC-SERS method was employed to detect Sudan I from an oil sample in this work.…”

Section: Resultsmentioning

confidence: 99%

Ultra-sensitive lab-on-a-chip detection of Sudan I in food using plasmonics-enhanced diatomaceous thin film

et al. 2017

View full text Add to dashboard Cite

Sudan I is a carcinogenic compound containing an azo group that has been illegally utilized as an adulterant in food products to impart a bright red color to foods. In this paper, we develop a facile lab-on-a-chip device for instant, ultra-sensitive detection of Sudan I from real food samples using plasmonics-enhanced diatomaceous thin film, which can simultaneously perform on-chip separation using thin layer chromatography (TLC) and highly specific sensing using surface-enhanced Raman scattering (SERS) spectroscopy. Diatomite is a kind of nature-created photonic crystal biosilica with periodic pores and was used both as the stationary phase of the TLC plate and photonic crystals to enhance the SERS sensitivity. The on-chip chromatography capability of the TLC plate was verified by isolating Sudan I in a mixture solution containing Rhodamine 6G, while SERS sensing was achieved by spraying gold colloidal nanoparticles into the sensing spot. Such plasmonics-enhanced diatomaceous film can effectively detect Sudan I with more than 10 times improvement of the Raman signal intensity than commercial silica gel TLC plates. We applied this lab-on-a-chip device for real food samples and successfully detected Sudan I in chili sauce and chili oil down to 1 ppm, or 0.5 ng/spot. This on-chip TLC-SERS biosensor based on diatomite biosilica can function as a cost-effective, ultra-sensitive, and reliable technology for screening Sudan I and many other illicit ingredients to enhance food safety.

show abstract

Section: Resultsmentioning

confidence: 99%

Ultra-sensitive lab-on-a-chip detection of Sudan I in food using plasmonics-enhanced diatomaceous thin film

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Wastes containing a preponderance of these compounds, such as heavy oils or oils that have undergone extensive weathering (and in which polar and asphaltenic material has therefore concentrated), may not, therefore, respond to bioremediation techniques. Unfortunately, in many cases, direct analysis of the entire range of waste components by GC‐coupled analytical techniques is restricted due to inadequate resolution of the complex, high molecular weight polar components [26].…”

Section: Resultsmentioning

confidence: 99%

A performance assessment of source correlation and weathering indices for petroleum hydrocarbons in the environment

Whittaker

Pollard

1997

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

Abstract-The source of petroleum contaminants in the environment and the extent to which these contaminants have weathered following deposition can often be determined through an empirical evaluation of oil n-alkanes, isoprenoids (pristane and phytane), and hopane and sterane biomarkers. Common source correlation and weathering indices have been calculated for three sets of oil samples: fresh, 25% (w/w) weathered, and 50% (w/w) physically weathered diesel standards, crude oils from different sources, and a set of representative heavy oils. For the weathered diesel oils, the C 18

show abstract

“…1983; Ongley et al . 1988; Pollard & Hrudey 1992), and it can only be speculated that where other methodologies are utilized, Soxhlet extraction is perceived to be too time‐consuming (requiring 16–24 h for extraction) and/or too tedious.…”

Section: Discussionmentioning

confidence: 99%

Assessing the toxicity of chemically fractionated Hamilton Harbour (Lake Ontario) sediment using selected aquatic organisms

2004

View full text Add to dashboard Cite

Studies of the sediments of Hamilton Harbour, Lake Ontario, Canada, have shown variable degrees of pollution with a large number of organic and inorganic pollutants. Three areas in the Harbour -Windemere Basin, Cootes Paradise and Randle Reef -exhibited particularly high levels of contaminants, with concomitant impacts on benthic organisms. Sediment samples examined in this study were taken from a site in Randle Reef in Hamilton Harbour and a station (LE 23) in Lake Erie used as a reference sample. The samples were subjected to chemical fractionation to remove organic contaminants, with one fraction being used as total extract, and another aliquot being subjected to silica gel fractionation to give four fractions. Each fraction was chemically analysed and an aliquot used for bioassays following exchange with dimethylsulfoxide. Standard biotests were performed with Daphnia magna, Hyalella azteca, Pimephales promelas (fathead minnows) and Selenastrum capricornutum . Results from direct sediment contact bioassays indicated that sediment from Randle Reef is highly toxic, whereas the Lake Erie sample had no observable impacts. Total extract when added at 1% to the bioassays replicated the solid phase with acute toxicity for Randle Reef, and no effect on Lake Erie. For the silica gel fractionation, Fraction 1 (F1) showed similar toxicity as the total extract, even at low additions, whereas F2-4 gave variable and inconclusive results. F1 eluted with hexane contained the non-polar fractions, predominantly the polyaromatic hydrocarbons, and these compounds are the most likely causative agents for the highly acute toxicity observed in the sediment of Randle Reef.

show abstract

Hydrocarbon wastes at petroleum- and creosote-contaminated sites: rapid characterization of component classes by thin-layer chromatography with flame ionization detection

Cited by 43 publications

References 17 publications

Ultra-sensitive lab-on-a-chip detection of Sudan I in food using plasmonics-enhanced diatomaceous thin film

Ultra-sensitive lab-on-a-chip detection of Sudan I in food using plasmonics-enhanced diatomaceous thin film

A performance assessment of source correlation and weathering indices for petroleum hydrocarbons in the environment

Assessing the toxicity of chemically fractionated Hamilton Harbour (Lake Ontario) sediment using selected aquatic organisms

Contact Info

Product

Resources

About