Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-11-01T21:32:49Z
No. of bitstreams: 1
KarinaCavalcanteDeOliveira_DISSERT.pdf: 1728605 bytes, checksum: 96c5810c528f87422422321c78049b6c (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-11-08T00:03:54Z (GMT) No. of bitstreams: 1
KarinaCavalcanteDeOliveira_DISSERT.pdf: 1728605 bytes, checksum: 96c5810c528f87422422321c78049b6c (MD5) / Made available in DSpace on 2017-11-08T00:03:54Z (GMT). No. of bitstreams: 1
KarinaCavalcanteDeOliveira_DISSERT.pdf: 1728605 bytes, checksum: 96c5810c528f87422422321c78049b6c (MD5)
Previous issue date: 2017-02-02 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / O uso de agrot?xicos t?m trazido enormes benef?cios em termos de aumento da produ??o e qualidade dos produtos agr?colas. Contudo, o uso indiscriminado dos agrot?xicos representa um risco para sa?de humana, sendo a ingest?o de alimentos uma das principais formas de exposi??o a essas subst?ncias t?xicas. Neste trabalho, foi desenvolvido e validado um m?todo anal?tico para determina??o multiresidual de 10 carbamatos (aldicarbe, aldicarbe sulf?xido, aldicarbe sulfona, carbaril, carbofurano, 3-hidroxicarbofurano, metiocarbe, metomil, oxamyl e propoxur) em piment?es comercializados na cidade de Natal/ RN. O desenvolvimento do m?todo consistiu na extra??o em fase s?lida manual seguida de an?lise por Cromatografia L?quida de Alta Efici?ncia acoplada com detector de arranjo de fotodiodos para a regi?o do UV-Vis?vel. Na valida??o foi avaliada a sensibilidade, linearidade, precis?o, exatid?o, limite de detec??o, limite de quantifica??o e robustez. As curvas anal?ticas apresentaram linearidade entre 0,1 e 1,1 mg L-1 para o aldicarbe sulfona, propoxur, carbaril e 3-hidroxicarbofurano, entre 0,1 e 0,9 mg L-1 para o carbofurano e entre 0,3 e 1,1 mg L-1 para o aldicarbe sulf?xido, oxamyl, metomil, aldicarbe e metiocarbe. Os coeficientes de correla??o variaram entre 0,9599 e 0,9939. O limite de detec??o (LD) ficou entre 0,0216 e 0,1319 mg L-1 e o limite de quantifica??o (LQ) entre 0,0719 e 0,4395. O m?todo tamb?m apresentou boa precis?o, com todos os valores de desvio padr?o relativos inferiores a 20%. A extra??o que apresentou melhor resultado foi a que n?o continha carv?o ativado, mas tinha a presen?a do tamp?o de ?cido ac?tico. Foi poss?vel recuperar o aldicarbe sulf?xido, 74,8%, oxamyl, 110,0%, metomil, 150,0%, e aldicarbe, 55,0%. / The use of agrochemicals have brought enormous benefits in terms of increasing production and quality of agricultural products. However, the indiscriminate use of agrochemicals represents a risk to human health, being the food intake one of the main forms of exposure to these toxic substances. An analytical method for the determination of 10 carbamates (aldicarb, aldicarb sulfoxide, aldicarb sulfone, carbaryl, carbofuran, 3-hydroxycarbbofuran, methiocarb, methomyl, oxamyl and propoxur) was developed and validated in green chillies sold in the city of Natal / RN. The development of the method consisted of manual Solid Phase Extraction followed by High Performance Liquid Chromatography coupled with photodiode arrangement detector for the UV-Visible region. In the validation the sensitivity, linearity, precision, accuracy, detection limit, quantification limit and robustness were evaluated. The analytical curves showed linearity between 0.1 and 1.1 mg L-1 for aldicarb sulfone, propoxur, carbaryl and 3-hydroxycarbofuran, between 0.1 and 0.9 mg L-1 for carbofuran and between 0.3 and 1.1 mg L-1 for the aldicarb sulfoxide, oxamyl, methomyl, aldicarb and methiocarb. The correlation coefficients ranged from 0.9599 to 0.9939. The detection limit (DL) was between 0.0216 and 0.1319 mg L-1 and the quantification limit (LQ) was between 0.0719 and 0.4395. The method also showed good accuracy, with all relative standard deviation values lower than 20%. The extraction that presented the best result was the one that did not contain activated carbon, but had the presence of the acetic acid buffer. It was possible to recover aldicarb sulfoxide, 74.8%, oxamyl, 110.0%, methomyl, 151.0%, and aldicarb, 55.0%
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/24218 |
| Date | 02 February 2017 |
| Creators | Oliveira, Karina Cavalcante de |
| Contributors | 31482015404, Ribeiro, Livia Paulia Dias, 62946773353, Fernandes, Nedja Suely, 44420773472, Campos, Paulo Roberto Paiva, 09603247472, Silva, Henrique Eduardo Bezerra da, Moura, Maria de F?tima Vit?ria de |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM QU?MICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
Page generated in 0.0016 seconds