Investigation on the Performance of Chemically Modified Aquatic Macrophytes-Salvinia molesta for the Micro-Solid Phase Preconcentration of Cd(II) On-Line Coupled to FAAS.
In this study, a new method for the preconcentration of cadmium ions using modified aquatic macrophytes - Salvinia molesta as biosorbent in an on-line preconcentration system coupled to flame atomic absorption spectrometry (FAAS) was developed. The method is based on preconcentration of 20.0 mL sample at pH 3.75 through 35.0 mg of biosorbent at 10.0 mL min-1and subsequent elution with 0.5 mol L-1HNO3. A preconcentration factor of 31-fold, linear dynamic range from 5.0 to 70.0 µg L-1(r = 0.9996) and detection and quantification limits of 0.15 and 0.51 µg L-1were obtained. The characterization of the biosorbent chemically modified with NaOH and citric acid, was performed through FTIR and SEM measurements. The method precision was found to be 3.97 % and 1.48 % for 5.0 and 60.0 µg L-1Cd(II) solutions, respectively. The applicability of method was checked by analysis of different kind of water samples and certified reference material.
Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina (UEL), Rodovia Celso Garcia Cid, PR 445, Km 380, Londrina, PR, 86050-482, Brazil.
Fabio Antonio Suquila
FA
Cajamarca
Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina (UEL), Rodovia Celso Garcia Cid, PR 445, Km 380, Londrina, PR, 86050-482, Brazil.|Faculdade de Ciências Exatas e Tecnologia, FACET, Universidade Federal da Grande Dourados (UFGD), CEP 79804-970, Dourados, MS, Brazil.
Marcela Zanetti
MZ
Corazza
Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina (UEL), Rodovia Celso Garcia Cid, PR 445, Km 380, Londrina, PR, 86050-482, Brazil.
Maiyara Caroline
MC
Prete
Centro de Engenharias e Ciências Exatas, Universidade Estadual do Oeste do Paraná (UNIOESTE), Toledo, PR, 85903-000, Brazil.
Douglas Cardoso
DC
Dragunski
Centro de Engenharias e Ciências Exatas, Universidade Estadual do Oeste do Paraná (UNIOESTE), Toledo, PR, 85903-000, Brazil.
Cristiana
C
Rocker
Centro de Engenharias e Ciências Exatas, Universidade Estadual do Oeste do Paraná (UNIOESTE), Toledo, PR, 85903-000, Brazil.
Josiane
J
Caetano
Centro de Ciências Agrárias, Universidade Estadual do Oeste do Paraná (UNIOESTE), Marechal Cândido Rondon, PR, 85960-000, Brazil.
Affonso Celso
AC
Gonçalves Júnior
Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina (UEL), Rodovia Celso Garcia Cid, PR 445, Km 380, Londrina, PR, 86050-482, Brazil. ctarleyquim@yahoo.com.br.|Departamento de Química Analítica, Instituto Nacional de Ciência e Tecnologia (INCT) de Bioanalítica, Universidade Estadual de Campinas (UNICAMP), Instituto de Química, Cidade Universitária Zeferino Vaz, s/n, Campinas, SP, 13083-970, Brazil. ctarleyquim@yahoo.com.br.
César Ricardo Teixeira
CR
Tarley
D000327:Adsorption; D001673:Biodegradation, Environmental; D002104:Cadmium / Q000737:chemistry* / Q000302:isolation & purification*; D019343:Citric Acid / Q000737:chemistry; D029624:Ferns / Q000737:chemistry*; D057230:Limit of Detection; D012972:Sodium Hydroxide / Q000737:chemistry; D013054:Spectrophotometry, Atomic
D002104:Cadmium; D019343:Citric Acid; D012972:Sodium Hydroxide
Atomic spectrometry; Biosorption; Flow injection analysis and water