Comparative study on disappearance trends of captan and trifloxystrobin residues on fruit and apple tree leaves using internal normalisation method

作者：Sadlo Stanislaw^*; Duda Magdalena; Piechowicz Bartosz; Jazwa Agnieszka

来源：Food Additives and Contaminants Part A-Chemistry Analysis Control Exposure& Risk Assessment, 2013, 30(5): 826-832.

DOI：10.1080/19440049.2013.790088

• captan
• trifloxystrobin
• residues
• apples
• disappearance trends
• internal normalisation

Supervised field trials were carried out in a commercial orchard in 2011. The purpose of the study was to assess the usefulness of the comparative method to examine the mechanism of disappearance of pesticide residues. Captan and trifloxystrobin residues were determined with the use of gas chromatograph equipped with a micro-electron capture detector. Disappearance trends of captan and trifloxystrobin residues in fruit and leaves were estimated using the method of internal normalisation, and based on that, the courses of concentration changes of these substances on fruit and leaves and the amount of these substances in one apple were established. The initial deposits of trifloxystrobin on leaves and fruits dropped by 50% within 8 and 4 days after treatment, respectively, in both varieties, whereas captan residues dropped by 50% within 29 days in leaves and 7 days in apples of the Olive Yellow varieties.

• 出版日期2013-5-1