Development and application of fluorescence sensor and test strip based on molecularly imprinted quantum dots for the selective and sensitive detection of propanil in fish and seawater samples.
J Hazard Mater
; 389: 121884, 2020 05 05.
Article
em En
| MEDLINE
| ID: mdl-31879102
ABSTRACT
Molecularly imprinted quantum dots (MIP-QDs) were successfully synthesized via reversed-phase microemulsion and used as the specific recognition element and signal probe of a fluorescence sensor or test strip to achieve the highly sensitive detection of propanil. The physical-chemical characteristics and excellent selectivity of MIP-QDs were elucidated. Under optimized parameters, the MIP-QDs had good linearity at the propanil concentration range of 1.0⯵g/L to 20.0â¯×â¯103 µg/L by fluorescence quenching. The developed MIP-QD-based fluorescence sensor showed good recoveries ranging from 87.2 % to 112.2 %, and the relative standard deviation was below 6.0 % for the fish and seawater samples. In addition, the limits of detection (LODs) for fish and seawater were 0.42⯵g/kg and 0.38⯵g/L, respectively. The fluorescence test strip developed on the basis of the MIP-QDs also displayed satisfactory recoveries of 90.1 %-111.1 %, and the LOD for propanil in the seawater sample was 0.6⯵g/L. The proposed fluorescence sensor and test strip were successfully used in propanil determination in environment and aquatic products.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Propanil
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Água do Mar
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Poluentes Químicos da Água
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Contaminação de Alimentos
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Pontos Quânticos
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Peixes
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Herbicidas
Tipo de estudo:
Diagnostic_studies
Limite:
Animals
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article