TY - JOUR T1 - Gas chromatographic determination of captan, folpet, and captafol residues in tomatoes, cucumbers, and apples using a wide-bore capillary column: interlaboratory study. AU - Gilvydis,D M, AU - Walters,S M, PY - 1991/9/1/pubmed PY - 1991/9/1/medline PY - 1991/9/1/entrez SP - 830 EP - 5 JF - Journal - Association of Official Analytical Chemists JO - J Assoc Off Anal Chem VL - 74 IS - 5 N2 - An interlaboratory study of the determination of captan, folpet, and captafol in tomatoes, cucumbers, and apples was conducted by 4 laboratories using wide-bore capillary column gas chromatography with electron capture detection. The 3 fungicides were determined using the Luke et al. multiresidue method modified to include additional solvent elution in the optional Florisil column cleanup step used with this method. The crops were fortified with each fungicide at 3 levels per crop. Mean recoveries ranged from 86.2% for a 25.1 ppm level of captan in apples to 115.4% for a 0.288 ppm level of captafol in apples. Interlaboratory coefficients of variation ranged from 3.4% (24.7 ppm folpet) to 9.7% (0.243 ppm captafol) for tomatoes; from 2.8% (2.0 ppm captafol) to 8.2% (24.8 ppm captan) for cucumbers; and from 1.5% (0.234 ppm folpet) to 22.1% (0.266 ppm captafol) for apples. SN - 0004-5756 UR - https://www.unboundmedicine.com/medline/citation/1783591/Gas_chromatographic_determination_of_captan_folpet_and_captafol_residues_in_tomatoes_cucumbers_and_apples_using_a_wide_bore_capillary_column:_interlaboratory_study_ DB - PRIME DP - Unbound Medicine ER -