Development of immunosorbents for the analysis of forchlorfenuron in fruit juices by ion mobility spectrometry.
Anal Bioanal Chem
; 410(23): 5961-5967, 2018 Sep.
Article
em En
| MEDLINE
| ID: mdl-29982933
ABSTRACT
The advantages of using smart materials as immunosorbents in the analysis of complex matrices by ion mobility spectrometry (IMS) have been highlighted in this study. A novel analytical method has been proposed for the sensitive, selective, and fast determination of residues of the plant growth regulator forchlorfenuron in fruit juices. Three different monoclonal antibodies (s3#22, p2#21, and p6#41) were employed for the production of immunosorbents, based on Sepharose gel beads, which were characterized in terms of loading capacity, solvent resistance, and repeatability for its use in solid-phase extraction (SPE). Immunosorbents that were prepared with antibody p6#44 provided the best performance, with a loading capacity of 0.97 µg, a 10% (v/v) 2-propanol tolerance, and a reusability of at least eight uses. The SPE procedure involved the use of a column with 0.15 g Sepharose beads, containing 0.5 mg antibody, which was loaded to 20 mL of the sample, washed with 2 mL of water plus 2 mL of 10% (v/v) 2-propanol, and eluted with 2 mL of 2-propanol. The cleaned extract was directly analyzed by IMS, giving a limit of detection of 2 µg L-1 with a relative standard deviation of 7.6%. Trueness was assessed by the analysis of blank grape and kiwifruit juice samples spiked with forchlorfenuron concentrations from 10 to 400 µg L-1, with recoveries from 80 to 115%. The analytical performance of the proposed immunosorbent was compared with conventional extraction and cleanup methods, such as QuEChERS and C18-based SPE, giving the cleanest extracts for accurate determinations of forchlorfenuron by IMS. Graphical abstract á
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Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Compostos de Fenilureia
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Reguladores de Crescimento de Plantas
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Piridinas
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Extração em Fase Sólida
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Sucos de Frutas e Vegetais
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Análise de Alimentos
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Espectrometria de Mobilidade Iônica
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Imunoadsorventes
Tipo de estudo:
Evaluation_studies
Idioma:
En
Revista:
Anal Bioanal Chem
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Espanha