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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
07/07/2021 |
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Data da última atualização: |
28/09/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SÁ, I. P. de; SOUZA, G. B. de; NOGUEIRA, A. R. de A. |
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Afiliação: |
IVERO PITA DE SÁ, UFSCAR; GILBERTO BATISTA DE SOUZA, CPPSE; ANA RITA DE ARAUJO NOGUEIRA, CPPSE. |
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Título: |
Chromium speciation in organic fertilizer by cloud point extraction and optimization through experimental Doehlert design as support for legislative aspects. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Microchemical Journal, v.160, part A, jan. 2021, 105618. |
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Páginas: |
6 p. |
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ISSN: |
0026-265X |
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DOI: |
https://doi.org/10.1016/j.microc.2020.105618 |
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Idioma: |
Inglês |
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Conteúdo: |
Brazilian and EU legislation establishes 2 mg kg−1 as the maximum limit of Cr(VI) in organic fertilizers. A procedure involving chromium speciation was developed. With this approach, the interference caused by humic acid present in the samples was circumvented and met the legislation requirement. The procedure is based on the adjustment of the alkaline extraction (USEPA 3060A), and cloud point extraction (CPE) applied to determine Cr(VI) traces. The issues that directly affect Cr(VI) extraction in organic fertilizers, such as temperature, sample mass, and extractor volume were studied. Moreover, the parameters that influence CPE were evaluated using the Doehlert matrix. Under optimized conditions, the use of 0.2 g of sample and 10 mL of the extractor solution was defined. For the Cr(VI) separation and preconcentration (CPE), 2% (m v−1) NaCl, 0.3% (v v−1) Triton X-100, and 0.05% (m v−1) 1,5 diphenylcarbazide were used. UV–Vis spectrophotometry or flame atomic absorption spectrometry (FAAS) were used as detection techniques. They provided quantification limits of 1.38 and 1.82 µg g−1, respectively. The accuracy of the procedure was evaluated by analyzing certified reference materials (NIST 2701, Hexavalent Chromium in Contaminated Soil and NIST 695, Trace Elements in Multi-Nutrient Fertilizer) and analysis of spiked samples. The proposed procedure is suitable for the determination of Cr(VI) in organic fertilizers, meeting the requirements of normative instruction (NI) n. 7 (04/2016) of the Brazilian Ministry of Agriculture, Livestock and Supply and Regulation (EU) 2019/1009 of the European Parliament. MenosBrazilian and EU legislation establishes 2 mg kg−1 as the maximum limit of Cr(VI) in organic fertilizers. A procedure involving chromium speciation was developed. With this approach, the interference caused by humic acid present in the samples was circumvented and met the legislation requirement. The procedure is based on the adjustment of the alkaline extraction (USEPA 3060A), and cloud point extraction (CPE) applied to determine Cr(VI) traces. The issues that directly affect Cr(VI) extraction in organic fertilizers, such as temperature, sample mass, and extractor volume were studied. Moreover, the parameters that influence CPE were evaluated using the Doehlert matrix. Under optimized conditions, the use of 0.2 g of sample and 10 mL of the extractor solution was defined. For the Cr(VI) separation and preconcentration (CPE), 2% (m v−1) NaCl, 0.3% (v v−1) Triton X-100, and 0.05% (m v−1) 1,5 diphenylcarbazide were used. UV–Vis spectrophotometry or flame atomic absorption spectrometry (FAAS) were used as detection techniques. They provided quantification limits of 1.38 and 1.82 µg g−1, respectively. The accuracy of the procedure was evaluated by analyzing certified reference materials (NIST 2701, Hexavalent Chromium in Contaminated Soil and NIST 695, Trace Elements in Multi-Nutrient Fertilizer) and analysis of spiked samples. The proposed procedure is suitable for the determination of Cr(VI) in organic fertilizers, meeting the requirements of normative instruction (NI) n. 7 (04... Mostrar Tudo |
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Palavras-Chave: |
Cloud point extraction; Cr(VI); Flame atomic absorption spectrometry; Spectrophotometry. |
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Thesaurus Nal: |
Experimental design; Organic fertilizers. |
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Categoria do assunto: |
W Química e Física |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/224325/1/Chromium-Speciation-Organic.pdf
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Marc: |
LEADER 02503naa a2200253 a 4500
001 2132824
005 2021-09-28
008 2021 bl uuuu u00u1 u #d
022 $a0026-265X
024 7 $ahttps://doi.org/10.1016/j.microc.2020.105618$2DOI
100 1 $aSÁ, I. P. de
245 $aChromium speciation in organic fertilizer by cloud point extraction and optimization through experimental Doehlert design as support for legislative aspects.$h[electronic resource]
260 $c2021
300 $a6 p.
520 $aBrazilian and EU legislation establishes 2 mg kg−1 as the maximum limit of Cr(VI) in organic fertilizers. A procedure involving chromium speciation was developed. With this approach, the interference caused by humic acid present in the samples was circumvented and met the legislation requirement. The procedure is based on the adjustment of the alkaline extraction (USEPA 3060A), and cloud point extraction (CPE) applied to determine Cr(VI) traces. The issues that directly affect Cr(VI) extraction in organic fertilizers, such as temperature, sample mass, and extractor volume were studied. Moreover, the parameters that influence CPE were evaluated using the Doehlert matrix. Under optimized conditions, the use of 0.2 g of sample and 10 mL of the extractor solution was defined. For the Cr(VI) separation and preconcentration (CPE), 2% (m v−1) NaCl, 0.3% (v v−1) Triton X-100, and 0.05% (m v−1) 1,5 diphenylcarbazide were used. UV–Vis spectrophotometry or flame atomic absorption spectrometry (FAAS) were used as detection techniques. They provided quantification limits of 1.38 and 1.82 µg g−1, respectively. The accuracy of the procedure was evaluated by analyzing certified reference materials (NIST 2701, Hexavalent Chromium in Contaminated Soil and NIST 695, Trace Elements in Multi-Nutrient Fertilizer) and analysis of spiked samples. The proposed procedure is suitable for the determination of Cr(VI) in organic fertilizers, meeting the requirements of normative instruction (NI) n. 7 (04/2016) of the Brazilian Ministry of Agriculture, Livestock and Supply and Regulation (EU) 2019/1009 of the European Parliament.
650 $aExperimental design
650 $aOrganic fertilizers
653 $aCloud point extraction
653 $aCr(VI)
653 $aFlame atomic absorption spectrometry
653 $aSpectrophotometry
700 1 $aSOUZA, G. B. de
700 1 $aNOGUEIRA, A. R. de A.
773 $tMicrochemical Journal$gv.160, part A, jan. 2021, 105618.
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Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
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| 62. |  | BICUDO, J. C.; DIAS, M.; FERREIRA, A.; SOUZA, G. B. de; NOGUEIRA, A. R. de A. Avaliação da repetibilidade e reprodutibilidade de um espectrômetro de infravermelho próximo portátil. In: JORNADA CIENTÍFICA - EMBRAPA SÃO CARLOS, 6., 2014, São Carlos, SP. Anais... São Carlos: Embrapa Instrumentação: Embrapa Pecuária Sudeste, 2014. p. 89| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 64. | | VERHALEN, T. R.; SILVA, C. S. da; SOUZA, G. B. de; NOGUEIRA, A. R. de A. Avaliação de parâmetros para o preparo de materiais de referência. In: JORNADA CIENTÍFICA - EMBRAPA SÃO CARLOS, 5., 2013, São Carlos, SP. Anais... São Carlos, SP: Embrapa Pecuária Sudeste: Embrapa Instrumentação , 2013. p. 42 Editado por Ana Rita de Araújo; Simone Cristina Méo Nicura.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 66. | | DIAS, M.; DEL SANTO, V. R.; SOUZA, G. B. de; NOGUEIRA, A. R. de A. Avaliação de amostras destinadas a programa interlaboratorial por meio da espectroscopia de reflectância no infravermelho próximo (NIR´s). In: JORNADA CIENTÍFICA - EMBRAPA SÃO CARLOS, 4., 2012, São Carlos, SP. Anais... São Carlos: Embrapa Instrumentação: Embrapa Pecuária Sudeste, 2012. p. 97. (Embrapa Instrumentação. Documentos, 56).| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 69. | | PARRA, A.; LEMOS, S. G.; NOGUEIRA, A. R. de A.; TORRE NETO, A.; ALONSO, J. ATP determination using a flow injection potentiometric cobalt electrode. In: RENCONTRE TRANSFRONTALIÈRE CAPTEURS ET BIOCAPTEURS, 8., 2003, Ceret, FR: Université de Perpignan, 2003.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 70. | | BRONDI, S. H. G.; MACEDO, A. N.; NOGUEIRA, A. R. de A. Application of QuECHERS method and gas chromatography-mass spectrometry for the analysis of cypermethrin, fipronil and chlorfenvinphos residues in cattle´s milk, meat and fat. In: SIMPÓSIO EMBRAPA LABEX EUA DE SANIDADE ANIMAL, 2., 2012, Brasília, DF. Anais... Brasília: Embrapa Estudos e Capacitação, 2012. p.177-178| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 71. | | TREVISAN, L. C.; NOGUEIRA, A. R. de A.; NÓBREGA, J. A. Acid vapor partial digestion of biological samples in a focused microwave: multielement determination by ICP OES with axially-viewed configuration. In: RIO SYMPOSIUM ON ATOMIC SPECTROMETRY, 7., 2002, Florianópolis, SC. ICP Information Newsletter, v.28, n.1, june 2002. p.136. Tu34.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 73. | | GARCIA, E. E.; PEREIRA, C. D.; NOGUEIRA, A. R. de A.; NÓBREGA, J. A. Avaliação da correção de sinais de fundo causados pelos íons diatômicos Ar2 + e CN+ em ICP-MS com interface CRI. In: ENCONTRO NACIONAL DE QUÍMICA ANALÍTICA, 15.; CONGRESSO IBEROAMERICANO DE QUÍMICA ANALÍTICA, 3., 2009, Salvador, BA. Anais... Salvador: SBQ: UFBA, 2009.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| Registros recuperados : 705 | |
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