A Simple and Quick Method for the Determination of Pesticides in Environmental Water by HF-LPME-GC/MS

Autor: Helvécio C. Menezes, Breno P. Paulo, Maria José N. Paiva, Zenilda L. Cardeal

Publikováno v: Journal of Analytical Methods in Chemistry, Vol 2016 (2016)

This paper describes a simple and quick method for sampling and also for carrying out the preconcentration of pesticides in environmental water matrices using two-phased hollow fiber liquid phase microextraction (HF-LPME). Factors such as extraction

Externí odkaz: https://doaj.org/article/a4fee5a6214547cbbf6f2a8cff8ff60a

A new pyrolytic process with potential to convert free fatty acids into long chain nitriles and H2 intermediated by Fe nitrate

Autor: Rafael C. G. Pereira, Fabiano Gomes Ferreira de Paula, Helvécio C. Menezes, Breno P. Paulo, Ana Paula C. Teixeira, Zenilda de Lourdes Cardeal, Rochel Montero Lago, José D. Ardisson

Publikováno v: Journal of Analytical and Applied Pyrolysis. 145:104726

In this work, a new potential route to convert free fatty acids to long chain nitriles and fuel gas (H2/hydrocarbon) intermediated by Fe nitrate is proposed. Precursors based on Fe3+/RCOO-/NO3- were prepared by mixing Fe nitrate and oleic acid at the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e55742e0df0f330a930dd72b1bbdbbc6
https://doi.org/10.1016/j.jaap.2019.104726

New method to determination of naphthalene in ambient air using cold fiber-solid phase microextraction and gas chromatography–mass spectrometry

Autor: Zenilda de Lourdes Cardeal, Helvécio C. Menezes, Breno P. Paulo, Nathália T. Costa

Publikováno v: Microchemical Journal. 109:93-97

Naphthalene, a highly volatile polycyclic aromatic hydrocarbon (PAH), is classified as possibly carcinogenic to humans and can be found in various environments. This paper describes a cold fiber (CF) solid phase microextraction (SPME) sampling method

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8ee7b71e12a679fae1c3c0db0ba68ad
https://doi.org/10.1016/j.microc.2012.03.031

Simultaneous Determination of Catecholamines and Metanephrines in Urine by Liquid Chromatography Electrospray Ionization Tandem Mass Spectrometry: Successful Clinical Application

Autor: Leandro S. Vilhena, Breno P. Paulo, Tatiana C. C. Barbosa, Elvis C. Mateo, Maria E. R. Diniz

Publikováno v: Journal of the Brazilian Chemical Society v.26 n.8 2015
Journal of the Brazilian Chemical Society
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Journal of the Brazilian Chemical Society, Volume: 26, Issue: 8, Pages: 1684-1691, Published: AUG 2015

Determination of urinary catecholamines and metanephrines is important for diagnosis of pheochromocytoma. Liquid chromatography tandem mass spectrometry (LC-MS/MS) method has been developed for the determination of catecholamines and metanephrines in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b35811f33edb239f559c77ce3dfd21c
https://doi.org/10.5935/0103-5053.20150142