کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1243334 1495797 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of vibrational spectroscopic methods to identify and quantify multiple adulterants in herbal medicines
ترجمه فارسی عنوان
ارزیابی روشهای اسپکتروسکوپی ارتعاشی برای شناسایی و شمارش چندین عارضه در داروهای گیاهی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• Adulterants in seized herbal products are identified & quantified by MIR & NIR.
• A validated HPLC methodology was used as the reference method.
• PCA showed spectrally relevant separation based on the presence & type of adulterant.
• PLS MIR models demonstrated performance suitable for semi-quantification.
• The MIR, Raman and NIR spectra are reported with band assignments for sibutramine.

To counter the growth of herbal medicines adulterated with pharmaceuticals crossing borders, rapid, inexpensive and non-destructive analytical techniques, that can handle complex matrices, are required. Since mid-infrared (MIR), near infrared (NIR) and Raman spectroscopic techniques meet these criteria, their performance in identifying adulterants in seized weightloss herbal medicines is definitively determined. Initially a validated high pressure liquid chromatography methodology was used for reference identification and quantification of the adulterants sibutramine H2O·HCl, fenfluramine HCl and phenolphthalein. Of 38 products, only sibutramine and phenolphthalein were detected by HPLC. The spectroscopic measurements showed Raman was ill-suited due to sample burning and emission while NIR lacked adulterant selectivity. Conversely, MIR demonstrated apt identification performance, which manifested as spectrally meaningful separation based on the presence and type of adulterant during principal component analysis (test set validated). Partial least squares regression models were constructed from the MIR training sets for sibutramine and phenolphthalein – both models fitted the training set data well. Average test set prediction errors were 0.8% for sibutramine and 2.2% for phenolphthalein over the respective concentration ranges of 1.7–11.7% and 0.9–34.4%. MIR is apposite for the screening of anorectic and laxative adulterants and is the most viable technique for wider adulterant screening in herbal medicines.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 138, 1 June 2015, Pages 77–85
نویسندگان
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