Evaluation of diphenylamine derivatives in apple peel using gradient reversed-phase liquid chromatography with ultraviolet-visible absorption and atmospheric pressure chemical ionization mass selective detection |
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| Authors: | Rudell David R Mattheis James P Fellman John K |
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| Institution: | Tree Fruit Research Laboratory, Agricultural Research Service, United States Department of Agriculture, 1104 N. Western Ave., Wenatchee, WA 98801, USA. |
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| Abstract: | A method was developed for extracting, identifying, and quantifying diphenylamine (DPA) derivatives in the peel of DPA-treated apples using gradient reversed-phase liquid chromatography with ultraviolet-visible absorption and atmospheric pressure chemical ionization detection (LC-UV-vis-APCI-MS). Compounds routinely analyzed using this method included hydroxylated, nitrosated, nitrated, and methoxylated diphenylamine derivatives. Analysis of peel treated with 0-8 g L(-1) DPA showed that peel DPA content was a limiting factor in derivative production and that recovery of most compounds over this range was linear. |
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| Keywords: | 3-Methoxydiphenylamine 2-Nitrodiphenylamine 4-Nitrodiphenylamine 4-Hydroxydiphenylamine 3-Hydroxydiphenylamine 4-Methoxydiphenylamine |
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