Desenvolvimento de métodos de preparo de amostras para a subsequente determinação de metais em macroalgas.
In this work was proposed the use of two methods for sample preparation: oxygen pressurized microwave radiation assisted digestion (MW-O2-AD) and microwave radiation assisted UV-digestion (MW-UV-AD) for macroalgae from the Antarctic for further determination of As, Cd, Cr, Cu, Mn, Mo, Ni, Pb, V and...
Main Author: | |
---|---|
Other Authors: | , , , , |
Format: | Master Thesis |
Language: | Portuguese |
Published: |
Universidade Federal de Pelotas
2020
|
Subjects: | |
Online Access: | http://guaiaca.ufpel.edu.br:8080/handle/prefix/6076 |
id |
ftunivfpelotas:oai:repositorio.ufpel.edu.br:prefix/6076 |
---|---|
record_format |
openpolar |
spelling |
ftunivfpelotas:oai:repositorio.ufpel.edu.br:prefix/6076 2023-05-15T13:57:52+02:00 Desenvolvimento de métodos de preparo de amostras para a subsequente determinação de metais em macroalgas. Development of methods of sample preparation for subsequent determination of metals in macroalgae. Ferreira, Lizângela Rosa 73554367087 http://lattes.cnpq.br/0714688014937602 94853576053 http://lattes.cnpq.br/2461255030745891 Mesko, Márcia Foster 2020-06-29T12:45:10Z http://guaiaca.ufpel.edu.br:8080/handle/prefix/6076 por por Universidade Federal de Pelotas Centro de Ciências Químicas, Farmacêuticas e de Alimentos Programa de Pós-Graduação em Bioquímica e Bioprospecção UFPel Brasil http://guaiaca.ufpel.edu.br:8080/handle/prefix/6076 OpenAccess Preparo de amostra Metais Macroalgas Sample preparation Metals Macroalgae CNPQ::CIENCIAS BIOLOGICAS::BIOQUIMICA masterThesis 2020 ftunivfpelotas 2022-11-20T11:51:14Z In this work was proposed the use of two methods for sample preparation: oxygen pressurized microwave radiation assisted digestion (MW-O2-AD) and microwave radiation assisted UV-digestion (MW-UV-AD) for macroalgae from the Antarctic for further determination of As, Cd, Cr, Cu, Mn, Mo, Ni, Pb, V and Zn by inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma optical emission spectrometry (ICP OES). For MW-O2-AD method were evaluated 0.5, 1, 2, 3 and 7 mol l-1 HNO3 solutions at pressures of 1, 5 and 10 bar of O2. These same solutions were used in the MW-UV-AD and for 0.5 and 1 mol l-1 HNO3 was evaluated the use of H2O2. To compare the performance of proposed methods, the samples were also digested with concentrated HNO3 by microwave radiation assisted digestion (MWAD). Using MW-O2-AD (3 mol l-1 HNO3 and 5 bar of O2) and MW-UVAD (2 mol l-1 HNO3) methods the metals concentration was in agreement (above 91%) with the results obtained for digesteds using concentrated HNO3 for almost analytes. The accuracy of the proposed methods was evaluated using certified reference materials BCR 060 (Aquatic plant) and NIST 1515 (Apple leaves) and the agreements with certified values were above 92% for all analytes. Using the proposed methods the residual carbon content was always lower than 10% and the limit of detection was between 0.001 and 1.45 μg g-1 for all analyts. Additionally, the use of dilute HNO3 in both methods reduced the blank values and improved the LODs. Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES Neste trabalho foi proposta a utilização de dois métodos de preparo de amostras: a decomposição assistida por radiação micro-ondas sob pressão de O2 (MW-O2-AD) e a decomposição assistida por radiação micro-ondas e ultravioleta (MW-UV-AD), para macroalgas oriundas da Antártica visando a subsequente determinação de As, Cd, Cr, Cu, Mn, Mo, Ni, Pb, V e Zn por espectrometria de massa com plasma indutivamente acoplado (ICP-MS) e espectrometria de emissão óptica com ... Master Thesis Antarc* Antarctic Antártica Repositório Institucional da UFPEL (Universidade Federal de Pelotas) Antarctic Sob’ ENVELOPE(66.156,66.156,66.322,66.322) The Antarctic |
institution |
Open Polar |
collection |
Repositório Institucional da UFPEL (Universidade Federal de Pelotas) |
op_collection_id |
ftunivfpelotas |
language |
Portuguese |
topic |
Preparo de amostra Metais Macroalgas Sample preparation Metals Macroalgae CNPQ::CIENCIAS BIOLOGICAS::BIOQUIMICA |
spellingShingle |
Preparo de amostra Metais Macroalgas Sample preparation Metals Macroalgae CNPQ::CIENCIAS BIOLOGICAS::BIOQUIMICA Ferreira, Lizângela Rosa Desenvolvimento de métodos de preparo de amostras para a subsequente determinação de metais em macroalgas. |
topic_facet |
Preparo de amostra Metais Macroalgas Sample preparation Metals Macroalgae CNPQ::CIENCIAS BIOLOGICAS::BIOQUIMICA |
description |
In this work was proposed the use of two methods for sample preparation: oxygen pressurized microwave radiation assisted digestion (MW-O2-AD) and microwave radiation assisted UV-digestion (MW-UV-AD) for macroalgae from the Antarctic for further determination of As, Cd, Cr, Cu, Mn, Mo, Ni, Pb, V and Zn by inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma optical emission spectrometry (ICP OES). For MW-O2-AD method were evaluated 0.5, 1, 2, 3 and 7 mol l-1 HNO3 solutions at pressures of 1, 5 and 10 bar of O2. These same solutions were used in the MW-UV-AD and for 0.5 and 1 mol l-1 HNO3 was evaluated the use of H2O2. To compare the performance of proposed methods, the samples were also digested with concentrated HNO3 by microwave radiation assisted digestion (MWAD). Using MW-O2-AD (3 mol l-1 HNO3 and 5 bar of O2) and MW-UVAD (2 mol l-1 HNO3) methods the metals concentration was in agreement (above 91%) with the results obtained for digesteds using concentrated HNO3 for almost analytes. The accuracy of the proposed methods was evaluated using certified reference materials BCR 060 (Aquatic plant) and NIST 1515 (Apple leaves) and the agreements with certified values were above 92% for all analytes. Using the proposed methods the residual carbon content was always lower than 10% and the limit of detection was between 0.001 and 1.45 μg g-1 for all analyts. Additionally, the use of dilute HNO3 in both methods reduced the blank values and improved the LODs. Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES Neste trabalho foi proposta a utilização de dois métodos de preparo de amostras: a decomposição assistida por radiação micro-ondas sob pressão de O2 (MW-O2-AD) e a decomposição assistida por radiação micro-ondas e ultravioleta (MW-UV-AD), para macroalgas oriundas da Antártica visando a subsequente determinação de As, Cd, Cr, Cu, Mn, Mo, Ni, Pb, V e Zn por espectrometria de massa com plasma indutivamente acoplado (ICP-MS) e espectrometria de emissão óptica com ... |
author2 |
73554367087 http://lattes.cnpq.br/0714688014937602 94853576053 http://lattes.cnpq.br/2461255030745891 Mesko, Márcia Foster |
format |
Master Thesis |
author |
Ferreira, Lizângela Rosa |
author_facet |
Ferreira, Lizângela Rosa |
author_sort |
Ferreira, Lizângela Rosa |
title |
Desenvolvimento de métodos de preparo de amostras para a subsequente determinação de metais em macroalgas. |
title_short |
Desenvolvimento de métodos de preparo de amostras para a subsequente determinação de metais em macroalgas. |
title_full |
Desenvolvimento de métodos de preparo de amostras para a subsequente determinação de metais em macroalgas. |
title_fullStr |
Desenvolvimento de métodos de preparo de amostras para a subsequente determinação de metais em macroalgas. |
title_full_unstemmed |
Desenvolvimento de métodos de preparo de amostras para a subsequente determinação de metais em macroalgas. |
title_sort |
desenvolvimento de métodos de preparo de amostras para a subsequente determinação de metais em macroalgas. |
publisher |
Universidade Federal de Pelotas |
publishDate |
2020 |
url |
http://guaiaca.ufpel.edu.br:8080/handle/prefix/6076 |
long_lat |
ENVELOPE(66.156,66.156,66.322,66.322) |
geographic |
Antarctic Sob’ The Antarctic |
geographic_facet |
Antarctic Sob’ The Antarctic |
genre |
Antarc* Antarctic Antártica |
genre_facet |
Antarc* Antarctic Antártica |
op_relation |
http://guaiaca.ufpel.edu.br:8080/handle/prefix/6076 |
op_rights |
OpenAccess |
_version_ |
1766265793376419840 |