Data/hora: 11/06/2024 06:17:26

Biblioteca(s): | Embrapa Uva e Vinho.
Data corrente: | 14/12/2020
Data da última atualização: | 14/12/2020
Autoria: | QUATRIN, G. D.; PIZZUTTI, I. R.; GEBLER, L.; DIAS, J. V.; CARDOSO, C. D.
Afiliação: | GUSTAVO D. QUATRIN, FEDERAL UNIVERSITY OF SANTA MARIA (UFSM), CHEMISTRY DEPARTMENT, CENTER OF RESEARCH AND ANALYSIS OF RESIDUES AND CONTAMINANTS (CEPARC), 97105-900 SANTA MARIA, RS, BRAZIL; IONARA R. PIZZUTTI, FEDERAL UNIVERSITY OF SANTA MARIA (UFSM), CHEMISTRY DEPARTMENT, CENTER OF RESEARCH AND ANALYSIS OF RESIDUES AND CONTAMINANTS (CEPARC), 97105-900 SANTA MARIA, RS, BRAZIL; LUCIANO GEBLER, CNPUV; JONATAN V. DIAS, FEDERAL UNIVERSITY OF SANTA MARIA (UFSM), CHEMISTRY DEPARTMENT, CENTER OF RESEARCH AND ANALYSIS OF RESIDUES AND CONTAMINANTS (CEPARC), 97105-900 SANTA MARIA, RS, BRAZIL; CARMEM D. CARDOSO, FEDERAL UNIVERSITY OF SANTA MARIA (UFSM), CHEMISTRY DEPARTMENT, CENTER OF RESEARCH AND ANALYSIS OF RESIDUES AND CONTAMINANTS (CEPARC), 97105-900 SANTA MARIA, RS, BRAZIL.
Título: | New analytical method for chlorpyrifos determination in biobeds constructed in Brazil: Development and validation.
Ano de publicação: | 2020
Fonte/Imprenta: | Journal of Chromatography B-Analytical Technologies in the Biomedical and Life Sciences, v. 1157, p. 122285, 2020.
Idioma: | Inglês
Conteúdo: | A quick and efficient method was optimized and validated to determine chlorpyrifos in biobeds using ultraperformance liquid chromatography coupled to tandem mass spectrometry (UPLC-MS/MS). Chlorpyrifos was extracted from the matrix with 30 mL of a mixture of acetone, phosphoric acid and water 98:1:1 (v/v/v). After homogenization, centrifugation and filtration, 125 &#956;L of the extract was evaporated and reconstituted in 5 mL of methanol acidified with 0.1% acetic acid. Validation was performed by studying analytical curve linearity (r2), estimated instrument and method limits of detection and limits of quantification (LODi, LODm, LOQi and LOQm, respectively), accuracy, precision (expressed as relative standard deviation, RSD), and matrix effect. Accuracy and precision were determined from the amount of pesticide recovered from biobed blank samples (i.e. without pesticide residue) spiked with chlorpyrifos at three different concentrations (2, 10 and 50 mg kg&#8722;1), with seven replicates at each concentration. For all three concentrations studied, the average recovery values obtained were between 96 and 115% with RSD values lower than 20%. The validated LOQ obtained was 2 mg kg&#8722;1 (from recovery studies) and the matrix effect observed was lower than ± 20%, which demonstrated that there was neither considerable suppression nor enhancement of the analyte signal. The biobed system efficiently degraded chlorpyrifos in both 1) simulation of accidental spillage and 2) application of diluted pesticide solution. In the latter case, all the values obtained at the final sampling time (14 months) were below the validated LOQm.
Palavras-Chave: | Biomixture; Method validation; Solid phase bioreactor; UPLC–MS/MS.
Thesaurus Nal: | Pesticide degradation.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/219141/1/1-s2.0-S1570023220302464-main.pdf
Registro original: | Embrapa Uva e Vinho (CNPUV)
Exemplares: | CNPUV - (18558-1) - UPC - AP - DD -  -  -  - DIS