On-line Concentration and Fluorescence Determination HPLC for PAHs in Seawater Samples and its Application to Japan Sea
News May 16, 2012
An on line concentration and fluorescence determination HPLC for polycyclic aromatic hydrocarbons (PAHs) in seawater was proposed. An online concentration column packed with octadecyl polyvinyl alcohol polymer, a pump and a column switching valve were introduced in the conventional HPLC with a fluorescence detector. Only 1.0-100 mL seawater sample was introduced into the concentration column at 1.0 mL min(-1) without any other pretreatment except filtration. Then the trapped PAHs totally flew into the separation column and eluted separately to be detected fluorogenically. The proposed method had good linearity with correlation coefficients (r) ranged from 0.951 to 0.998, and limits of detection ranged from 0.002 to 0.50 ng L(-1) for 15 PAHs as 100 mL seawater was loaded. The sensitivity of the method was 10 to 100 times higher than those reported by other works. The proposed method was applied to the determination of PAHs in the seawater samples collected in the Japan Sea with satisfactory results and to check the present benzo[a]pyrene concentration at the beaches in Noto peninsula, Japan polluted with C-heavy oil spilled from the tanker in 1997.
The article is published online in the Journal of Analytical Methods in Chemistry and is free to access.
Microwaves Could be as Bad for the Environment as CarsNews
Microwaves usage across the EU alone emits as much carbon dioxide as nearly seven million cars according to a new study. Researchers have carried out the first ever comprehensive study of the environmental impacts of microwaves, considering their whole life cycle, from ‘cradle to grave’.READ MORE
Nitrogen Pollution Helps Sugar Maples but a Warmer, Drier Climate May Threaten ThemNews
Though Michigan's sugar maples benefit from the growth-promoting effects of nitrogen compounds in the environment, those gains will not fully offset the added stresses of growing under a drier climate in the future, according to a new study.READ MORE