Evaluation of river pollution of neonicotinoids in Osaka City (Japan) by LC/MS with dopant-assisted photoionisation
| Autor: | Hideya Kawasaki, Atsushi Yamamoto, Tomoko Terao, Hirotaka Hisatomi, Ryuichi Arakawa |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Chromatography
Photolysis Chemistry Public Health Environmental and Occupational Health Neonicotinoid Clothianidin General Medicine Management Monitoring Policy and Law Acetamiprid Dinotefuran chemistry.chemical_compound Japan Models Chemical Rivers Imidacloprid Liquid chromatography–mass spectrometry Environmental chemistry Thiamethoxam Pesticides Water Pollutants Chemical Nitenpyram Chromatography Liquid Environmental Monitoring |
| Zdroj: | Journal of environmental monitoring : JEM. 14(8) |
| ISSN: | 1464-0333 |
| Popis: | An atmospheric pressure photoionisation (APPI) source for liquid chromatography/mass spectrometry (LC/MS) was applied to determine neonicotinoid pesticides in the aquatic environment. Dopant-assisted APPI was very effective in the ionisation of neonicotinoids. Neonicotinoids generated protonated molecules in APPI with high sensitivity, while adduct ions, such as sodiated molecules, were predominantly generated in conventional electrospray ionisation. The ionisation of neonicotinoids was confirmed by ultra-high-resolution MS. An analytical method coupled with solid phase extraction was developed for acetamiprid, clothianidin, dinotefuran, imidacloprid, nitenpyram, and thiamethoxam. Method detection limits were 0.47 to 2.1 ng L(-1) for six neonicotinoids. Dinotefuran was the most frequent and highest among the neonicotinoids examined in the aquatic environment in Osaka, Japan. The maximum concentration of dinotefuran was 220 ng L(-1). Given the toxicity of neonicotinoids for aquatic creatures, the concentrations observed here were substantially low. The change in concentrations was temporally coincident with the period of the neonicotinoid application. Although rapid photodegradation and some degradation products have been elucidated, the degradation products in the aquatic environment were not identified in the present study. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|