Behaviour of Acephate and its metabolite Methamidophos in apple samples

  1. Sanz-Asensio, J. 1
  2. Martínz-Prado, A.P. 1
  3. Plaza-Medina, M. 1
  4. Martínez-Soria, M.T. 1
  5. Pérez-Clavijo, M. 1
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

Revista:
Chromatographia

ISSN: 0009-5893

Año de publicación: 1999

Volumen: 49

Número: 3

Páginas: 155-160

Tipo: Artículo

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DOI: 10.1007/BF02575278 SCOPUS: 2-s2.0-0033062242 DIALNET GOOGLE SCHOLAR

Otras publicaciones en: Chromatographia

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Resumen

A study of the decay of acéphale in apple samples was carried out, including penetration studies and the transformation of acéphale in to its main metabolite, methamidophos. Sample treatment involved extraction with ethyl acetate and determination by gas chromatography with nitrogen - phosphorus detection (GC-NPD). Three different parts of the fruit were studied separately: apple surface, peel and pulp. Recoveries were measured at three spiked levels, ranging from 0.050 to 0.504 μg g-1 for acéphale and 0.049 to 0.492 μg g-1 for methamidophos. Mean acéphale recoveries were 93.0 to 115.5 % from peel and 99.2 to 110.2 % from pulp, while methamidophos recoveries were 77.2 lo 104.2 % and 77.5 lo 98.6 % from peel and pulp, respectively (n = 6). Results showed lhat acéphale penetrates into Ihe fruil, where il is Iransformed lo melhamidophos. This Iransformalion was nol seen on Ihe external apple surface. © 1999 Friedr. Vieweg & Sohn Verlagsgesellschaft mbH.