Payá Paula, Oliva José, Cámara Miguel A, Barba Alberto
Departamento de Química Agrícola, Geología y Edafología, Facultad de Química, Universidad de Murcia, Murcia, Spain.
J Environ Sci Health B. 2007 Sep-Oct;42(7):767-73. doi: 10.1080/03601230701550899.
The objective of this work was to determine the dissipation of fenoxycarb and pyriproxyfen in fresh and canned peaches in order to know the levels of residues that can reach consumers in real circumstances. Two field dissipation studies were carried out, one of them at the pre-harvest interval (PHI) with good agricultural practice (GAP) and the other one in a situation of critical agricultural practice (CAP). Two canning dissipation studies were carried out for samples from both agricultural situations in an industrial pilot plant and the dissipation was determined in each relevant step. An analytical methodology was used including acetone-dichloromethane extraction, purification and analysis by liquid chromatography and diode array detection (LC-DAD) with a limit of quantification (LOQ) of 0.05 mg/kg. It was validated under SANCO/10232/2006 Guidelines. These pesticides complied with the official maximum residue limits (MRLs) in peaches at the PHI with good agricultural practices. In hypothetical situation of a second application at the PHI, fenoxycarb and pyriproxyfen residues were above the MRLs in peaches. The canning study reduced the residues to no detectable levels in the cans for consumers.
这项工作的目的是测定苯氧威和吡丙醚在新鲜桃子和罐装桃子中的消解情况，以便了解在实际情况下可能到达消费者手中的残留水平。进行了两项田间消解研究，其中一项是在收获前间隔期（PHI）按照良好农业规范（GAP）进行的，另一项是在关键农业规范（CAP）情况下进行的。针对来自这两种农业情况的样品，在一家工业试验工厂进行了两项罐装消解研究，并在每个相关步骤中测定了消解情况。采用了一种分析方法，包括丙酮 - 二氯甲烷萃取、净化以及通过液相色谱和二极管阵列检测（LC - DAD）进行分析，定量限（LOQ）为0.05 mg/kg。该方法依据SANCO/10232/2006指南进行了验证。在按照良好农业规范的收获前间隔期，这些农药在桃子中的残留量符合官方最大残留限量（MRLs）。在收获前间隔期进行第二次施药的假设情况下，桃子中苯氧威和吡丙醚的残留量超过了最大残留限量。罐装研究将残留量降低到消费者食用的罐装桃子中无法检测到的水平。
