Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | CHARACTERIZATION OF CARBOFURAN PHOTODEGRADATION BY-PRODUCTS BY LIQUID CHROMATOGRAPHY/HYBRID QUADRUPOLE TIME-OF-FLIGHT/MASS SPECTROMETRY |
| Abstract | The structural elucidation of by-products arising from carbofuran photodegradation using a highpressure UV lamp has been investigated by liquid chromatography/electrospray ionization tandem mass spectrometry (LC/ESI-MS/MS) employing a quadrupole time-of-flight mass spectrometer. Exact mass measurements of the [MþH]þ ions of the by-products and of product ions allowed the elemental formulae and related structures of seven photodegradation by-products (resulting, respectively, from photo-Fries rearrangement, hydroxylation of the benzene ring, oxidation of the 2,3-dihydrobenzofuran ring, cleavage of the carbamate group, hydrolysis of the ether group and the newly observed radical coupling and decarboxylation processes) to be determined confidently. Accurate mass measurements of product ions allowed ambiguities to be removed concerning neutral losses having the same nominal mass, namely CO and C2H4, allowing the fragmentation patterns to be rationalized. |
| Source | RCM. Rapid communications in mass spectrometry 19, pp. 2193–2202 |
| Journal | RCM. Rapid communications in mass spectrometry |
| Editor | Heyden,, London, Regno Unito |
| Year | 2005 |
| Type | Articolo in rivista |
| DOI | 10.1002/rcm.2036 |
| Authors | DETOMASO A., MASCOLO G., LOPEZ A. |
| Text | 42168 2005 10.1002/rcm.2036 CHARACTERIZATION OF CARBOFURAN PHOTODEGRADATION BY PRODUCTS BY LIQUID CHROMATOGRAPHY/HYBRID QUADRUPOLE TIME OF FLIGHT/MASS SPECTROMETRY DETOMASO A., MASCOLO G., LOPEZ A. Instituto di Ricerca Sulle Acque, C.N.R., Sezione di Bari, Via F. De Blasio 5, 70123 Bari, Italy The structural elucidation of by products arising from carbofuran photodegradation using a highpressure UV lamp has been investigated by liquid chromatography/electrospray ionization tandem mass spectrometry LC/ESI MS/MS employing a quadrupole time of flight mass spectrometer. Exact mass measurements of the MþH þ ions of the by products and of product ions allowed the elemental formulae and related structures of seven photodegradation by products resulting, respectively, from photo Fries rearrangement, hydroxylation of the benzene ring, oxidation of the 2,3 dihydrobenzofuran ring, cleavage of the carbamate group, hydrolysis of the ether group and the newly observed radical coupling and decarboxylation processes to be determined confidently. Accurate mass measurements of product ions allowed ambiguities to be removed concerning neutral losses having the same nominal mass, namely CO and C2H4, allowing the fragmentation patterns to be rationalized. 19 Characterization of carbofuran photodegradation byproducts by liquid chromatography/hybrid quadrupole time of flight mass spectrometry 2005_RCM.pdf Articolo in rivista Heyden, 0951 4198 RCM. Rapid communications in mass spectrometry RCM. Rapid communications in mass spectrometry RCM, Rapid commun. mass spectrom. Rapid communications in mass spectrometry RCM, DETOMASO ANTONIA antonio.lopez LOPEZ ANTONIO giuseppe.mascolo MASCOLO GIUSEPPE TA.P07.002.002 Sviluppo di nuovi processi di controllo dell inquinamento idrico. |