Raman spectroscopy coupled to high-resolution continuum source flame molecular absorption spectrometry for sequential determination of nitrogen species in fertilizers

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorWake Forest University-
Autor(es): dc.creatorOliveira, Evilim M.-
Autor(es): dc.creatorFerreira, Edilene C.-
Autor(es): dc.creatorGomes Neto, José A.-
Autor(es): dc.creatorDonati, George L.-
Autor(es): dc.creatorJones, Bradley T.-
Data de aceite: dc.date.accessioned2025-08-21T20:49:46Z-
Data de disponibilização: dc.date.available2025-08-21T20:49:46Z-
Data de envio: dc.date.issued2023-03-01-
Data de envio: dc.date.issued2023-03-01-
Data de envio: dc.date.issued2022-12-14-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.saa.2022.121737-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/240638-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/240638-
Descrição: dc.descriptionRaman spectroscopy (RS) was used to identify and quantify different nitrogen species in fertilizers. This is a fast and inexpensive method that requires no extensive sample preparation. Urea and nitrate were determined at 1000 and 1045 cm−1, respectively. Calibration plots obtained for these analytes showed adequate linearity, with regression coefficients (r) of 0.9989 and 0.9976, respectively. Ammonium was determined by difference after total N determination by high-resolution continuum source flame molecular absorption spectrometry (HR-CS FMAS), which provided a calibration plot with r = 0.9960. The inline coupling of RS and HR-CS FMAS allowed for a fast sequential determination of ammonium, nitrate, and urea, with limits of detection of 0.03 mg/L ammonium, 0.03 mg/L nitrate, and 0.01 mg/L urea. Relative standard deviations were ≤ 11 %, and the external standard calibration method provided accurate results for all analytes determined in certified reference materials, raw materials, and commercial samples of fertilizers. For comparison purposes, all samples were also analyzed by traditional Kjeldahl method. The RS HR-CS FMAS method was further validated by addition and recovery experiments, which provided recoveries in the 93 – 113 % range.-
Descrição: dc.descriptionInstitute of Chemistry São Paulo State University (UNESP)-
Descrição: dc.descriptionDepartment of Chemistry Wake Forest University, Salem Hall, Box 7486-
Descrição: dc.descriptionInstitute of Chemistry São Paulo State University (UNESP)-
Idioma: dc.languageen-
Relação: dc.relationSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectHR-CS FMAS-
Palavras-chave: dc.subjectNitrogen speciation-
Palavras-chave: dc.subjectNPK Fertilizer-
Palavras-chave: dc.subjectRaman spectroscopy-
Título: dc.titleRaman spectroscopy coupled to high-resolution continuum source flame molecular absorption spectrometry for sequential determination of nitrogen species in fertilizers-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.