Identification, quantification and distribution of substituted phenols in the dissolved and suspended phases of water samples by gas chromatography tandem mass spectrometry: Derivatization, mass fragmentation and acquisition studies

2015 ◽  
Vol 118 ◽  
pp. 45-54 ◽  
Author(s):  
T. Faludi ◽  
A. Vasanits-Zsigrai ◽  
Gy Záray ◽  
I. Molnár-Perl
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Tandem Mass Spectrometry ◽  
Water Samples ◽  
Tandem Mass ◽  
Substituted Phenols ◽  
Chromatography Tandem Mass Spectrometry ◽  
Mass Fragmentation

scholarly journals Impact of Photolysis and TiO2 on Pesticides Degradation in Wastewater

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 655
Author(s):  
Mohamed H. EL-Saeid ◽  
Modhi. O. Alotaibi ◽  
Mashael Alshabanat ◽  
Murefah Mana AL-Anazy ◽  
Khadijah R. Alharbi ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Tandem Mass Spectrometry ◽  
Water Samples ◽  
Animal Health ◽  
Tandem Mass ◽  
Triple Quadrupole ◽  
Chromatography Tandem Mass Spectrometry ◽  
Low Levels

Pesticide residues are harmful to the environment and human and animal health even at low levels because of long-term bioaccumulation. In this study, photolysis was applied to treat three representative water samples: aqueous atrazine and dimethoate solutions as target pesticides, as well as wastewater and agriculture wastewater containing pesticide residue. It was performed using ultraviolet (UV) irradiation at two wavelengths (254 and 306 nm) with exposure times ranging from 2 to 12 h in the presence and absence of a photocatalyst to identify the optimal degradation conditions. Extraction and analyzation process were performed by the Quick Easy Cheap Effective Rugged Safe (QuEChERS) methods and gas chromatography–tandem mass spectrometry with triple quadrupole detector (GC–MSMS/TQD), respectively. Photodegradation increased with an increase in exposure time and the TiO2 catalyst was beneficial for degradation. Both selected irradiation wavelengths were effective, although the wavelength of λ = 306 nm was the most efficient.

Sign in / Sign up

Export Citation Format

Share Document