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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

N-compounds speciation analysis in environmental samples using ultrasound-assisted solid-liquid extraction and non-chromatographic techniques

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Author(s):
Moreira, Ailton Jose [1, 2] ; Freschi, Carolina Dakuzaku [1] ; Pereira, Ernesto Chaves [2] ; Giovanni Freschi, Gian Paulo [1]
Total Authors: 4
Affiliation:
[1] Univ Fed Alfenas, Inst Sci & Technol, UNIFAL MG, LAFFEQ, BR-37715400 Pocos De Caldas, MG - Brazil
[2] Univ Fed Sao Carlos, UFSCar SP, Chem Dept, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: ENVIRONMENTAL MONITORING AND ASSESSMENT; v. 193, n. 5 MAY 2021.
Web of Science Citations: 0
Abstract

A fast, efficient, and non-chromatographic method was presented in this study for nitrite, nitrate, and p-nitrophenol (N-compounds) extraction and speciation analysis of environmental samples. By applying ultrasound-assisted solid-liquid extraction (USLE), analytes were efficiently extracted from water, soil, or sediment collected in areas of environmental disaster. These analytes were selectively converted to NO(g) through UV photolysis (NO3-), H2O2/UV photocatalysis (PNP), and direct conversion (NO2-). Following conversion, NO(g) was separated from the liquid phase and determined by high-resolution continuum source molecular absorption spectrometry (HR-CS MAS). The LODs obtained were 0.0970.004 mg L-1 for nitrite, 0.1190.004 mg L-1 for nitrate, and 0.090 +/- 0.006 mg L-1 for p-nitrophenol. On applying this speciation method to environmental samples, concentrations were found to be up to 0.99 +/- 0.03 mg L-1 (NO2-), 49.80 +/- 2.5 mg L-1 (NO3-), and 0.10 +/- 0.02 mg L-1 (PNP). Finally, addition/recovery study of real water, soil, and sediment samples showed 101 +/- 2% recovery for NO2-, 100 +/- 1% for NO3-, and 96 +/- 5% for PNP. (AU)

FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 17/11986-5 - Generation and storage of New Energy: bringing technological development for the country
Grantee:Ana Flávia Nogueira
Support Opportunities: Research Grants - Applied Research Centers Program
FAPESP's process: 14/50249-8 - Green chemistry: sustainable synthetic methods employing benign solvents, safer reagents, and bio-renewable feedstock
Grantee:Arlene Gonçalves Corrêa
Support Opportunities: Research Grants - Applied Research Centers Program