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Determination of isopropylmethylphenols in black seed oil by differential pulse voltammetry.
Phytochem Anal. 2004 Sep-Oct; 15(5):320-4.PA

Abstract

A differential pulse voltammetric method is presented for the determination of isopropylmethylphenols (carvacrol and/or thymol) in phytotherapeutic black seed oils. The voltammetric behaviours of these phenols were examined in various buffer systems over the pH range 3.5-10.0. In Sörensen buffered methanol solution (3:7; v:v; pH 8.5), the differential pulse voltammograms exhibited reproducible peaks at Ep + 0.49 V vs. silver-silver chloride-potassium chloride 3 M for both carvacrol and thymol. Under these conditions, a plot of peak height against concentration of the isopropylmethylphenols was found to be linear over the range 0.25-2.5 microg/mL (r = 0.999). The detection limit was 0.04 microg/mL. The described voltammetric method was tested on two black seed oils available on the Austrian market.

Authors+Show Affiliations

Institut für Pharmazeutische Chemie und Pharmazeutische Technologie der Karl-Franzens-Universität Graz, Schubertstrasse 1, A-8010 Graz, Austria. astrid.ortner@kfunigraz.atNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

15508837

Citation

Michelitsch, Astrid, et al. "Determination of Isopropylmethylphenols in Black Seed Oil By Differential Pulse Voltammetry." Phytochemical Analysis : PCA, vol. 15, no. 5, 2004, pp. 320-4.
Michelitsch A, Rittmannsberger A, Hüfner A, et al. Determination of isopropylmethylphenols in black seed oil by differential pulse voltammetry. Phytochem Anal. 2004;15(5):320-4.
Michelitsch, A., Rittmannsberger, A., Hüfner, A., Rückert, U., & Likussar, W. (2004). Determination of isopropylmethylphenols in black seed oil by differential pulse voltammetry. Phytochemical Analysis : PCA, 15(5), 320-4.
Michelitsch A, et al. Determination of Isopropylmethylphenols in Black Seed Oil By Differential Pulse Voltammetry. Phytochem Anal. 2004 Sep-Oct;15(5):320-4. PubMed PMID: 15508837.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Determination of isopropylmethylphenols in black seed oil by differential pulse voltammetry. AU - Michelitsch,Astrid, AU - Rittmannsberger,Anna, AU - Hüfner,Antje, AU - Rückert,Ulla, AU - Likussar,Werner, PY - 2004/10/29/pubmed PY - 2004/12/16/medline PY - 2004/10/29/entrez SP - 320 EP - 4 JF - Phytochemical analysis : PCA JO - Phytochem Anal VL - 15 IS - 5 N2 - A differential pulse voltammetric method is presented for the determination of isopropylmethylphenols (carvacrol and/or thymol) in phytotherapeutic black seed oils. The voltammetric behaviours of these phenols were examined in various buffer systems over the pH range 3.5-10.0. In Sörensen buffered methanol solution (3:7; v:v; pH 8.5), the differential pulse voltammograms exhibited reproducible peaks at Ep + 0.49 V vs. silver-silver chloride-potassium chloride 3 M for both carvacrol and thymol. Under these conditions, a plot of peak height against concentration of the isopropylmethylphenols was found to be linear over the range 0.25-2.5 microg/mL (r = 0.999). The detection limit was 0.04 microg/mL. The described voltammetric method was tested on two black seed oils available on the Austrian market. SN - 0958-0344 UR - https://www.unboundmedicine.com/medline/citation/15508837/Determination_of_isopropylmethylphenols_in_black_seed_oil_by_differential_pulse_voltammetry_ L2 - https://doi.org/10.1002/pca.785 DB - PRIME DP - Unbound Medicine ER -