کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1199614 1493590 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development and validation of a high-resolution mass-spectrometry–based method to study the long-term stability of natural and synthetic glucocorticoids in faeces
ترجمه فارسی عنوان
توسعه و اعتبار سنجی با استفاده از روش جرمی-طیف سنجی با وضوح بالا برای مطالعه پایداری درازمدت گلوکوکورتیکوئید های طبیعی و مصنوعی در مدفوع
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• Plackett–Burman successfully applied for generic extraction of glucocorticoids.
• UHPLC coupled to full-scan high-resolution Orbitrap MS analysis at 50,000 FWHM.
• Validation according to CD 2002/657/EC.
• Long-term stability (20 weeks) of glucocorticoids in bovine faeces.
• Storage at -80°C and lyophilisation were most optimal.

Faecal glucocorticoid analysis is a powerful non-invasive tool for the study of the animal endocrine status and stress physiology, which is mainly carried out by immunoassays, characterised by some limitations. In this study, an ultra high-performance liquid chromatography coupled to high resolution Orbitrap mass spectrometry (U-HPLC-HRMS) method was developed to confirm the presence of glucocorticoids in bovine faeces during a long-term stability study. Because of the complex nature of faeces, an appropriate extraction and purification procedure was developed. To this extent, a Plackett–Burman experimental design was successfully applied to determine the key conditions for optimal extraction of glucocorticoids from faeces. The targeted analysis, including natural and synthetic glucocorticoids, was successfully validated according to CD 2002/657/EC. Decision limits and detection capabilities for prednisolone, prednisone, methylprednisolone and the metabolites 20α-dihydroprednisolone and 20β-dihydroprednisolone ranged, respectively, from 0.15 to 2.95 μg kg−1 and from 0.40 to 5.20 μg kg−1. Limits of detection and limits of quantification for the natural glucocorticoids dihydrocortisone, cortisol and cortisone ranged, respectively, from 0.55 to 2.10 μg kg−1 and from 0.70 to 5.00 μg kg−1.The stability study of glucocorticoids in faecal matrix demonstrated that lyophilising the faeces, storage at -80°C, and aerobic conditions were optimal for preservation and able to significantly (p < 0.05) limit degradation up to 10 weeks.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1336, 4 April 2014, Pages 76–86
نویسندگان
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