التفاصيل البيبلوغرافية
| العنوان: |
A method based on the conversion and determination of folpet and phthalimide residues in tea by GC-MS/MS and GC-TOF-HRMS. |
| المؤلفون: |
Han, Chao1 (AUTHOR), Huang, Chaoqun1,2 (AUTHOR) hcq@zaiq.org.cn, Jiang, Qinting2 (AUTHOR), Chen, Li2 (AUTHOR), Li, Yi2 (AUTHOR), Lou, Chengjie2 (AUTHOR), Lu, Hailing2 (AUTHOR), Shen, Yan1,3 (AUTHOR) shenyan@wzu.edu.cn |
| المصدر: |
Microchemical Journal. Aug2022, Vol. 179, pN.PAG-N.PAG. 1p. |
| مصطلحات موضوعية: |
*TIME-of-flight mass spectrometry, *GAS chromatography/Mass spectrometry (GC-MS), *LIQUID chromatography-mass spectrometry, *SOLID phase extraction, *TEA, *MASS spectrometry, *GAS chromatography |
| مستخلص: |
[Display omitted] • Determination of Folpet and Phthalimide residues in tea by GC-MS/MS and GC-TOF HRMS. • The tea samples were heated at 80 °C for 30 min to convert all folpet to phthalimide. • Isotope internal standard and matrix-matched calibration were used. • The structure analysis of phthalimide and folpet were carried out. A novel and accurate method was developed for the determination of folpet and phthalimide residues in tea by solid-phase extraction (SPE) in combination with gas chromatography-tandem mass spectrometry (GC-MS/MS). According to related studies, folpet is easily degraded into phthalimide during sample pretreatment and GC injection. In this study, the conversion of all folpet to phthalimide prior to sample extraction and purification was proposed for the first time. An isotopic internal standard was used for quantification. The average recoveries ranged from 80.5 to 92.3% with RSD ≤7.2%. The limit of quantification for phthalimide was 5.0 µg/kg. The phthalimide content was accurately determined and converted to the folpet content to satisfy the requirements of regulations. The detected samples were further confirmed by gas chromatography time-of-flight high-resolution mass spectrometry (GC-TOF HRMS). This was a novel and particular attempt to resolve issues regarding folpet degradation, and satisfactory results were obtained. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
Academic Search Index |
