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Study of Antioxidant Activity of Essential Oil of Thymus serpyllum

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Author(s): M. Aslam | N. Afza | I. Anis | M. Khalid | A. Hussain | T. H. Bokhari, | M. Ibrahim | B. Ali | M. Niaz | A. H. Chaudhry | M. Arshad

Journal: Pakistan Journal of Chemistry
ISSN 2220-2625

Volume: 2;
Issue: 3;
Start page: 122;
Date: 2012;
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Keywords: Thymus serpyllum | Antioxidant activity | DMPD/ferric chloride assay | DMPD radical cation

ABSTRACT
The antioxidant activity of essential oil of Thymus serpyllum was determined by using DMPD/ferric chloride assay. The purplecolored cation was formed by the oxidation of N,N-dimethyl-p-phenylenediamine (DMPD) with 0.05 M solution of ferric chloride.The purple colored radical cation obtained was decolorized by the antioxidants present in Thymus serpyllum oil. The antioxidantvalue of Thymus serpyllum oil was then measured by its ability to inhibit the color intensity of DMPD radical cation. It was alsoobserved that the antioxidant value of Thymus serpyllum oil decreased with the passage of time.
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