Journal
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
Volume 104, Issue -, Pages 38-47Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jaap.2013.09.011
Keywords
Pyroligneous acid; Rosmarinus officinalis; Pyrolysis; Antioxidant activity; GC-MS
Funding
- Special Fund for Forestry Scientific Research in the Public Interest [201304601]
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We studied the pyrolysis process and products of Rosmarinus officinalis leaves. Three kinds of plant materials were used: fresh leaves, air-dried leaves, and air-dried leaves after essential oil distillation. The pyroligneous acids (PA) obtained by pyrolyzing the plant materials with different heating powers were extracted with organic solvents, including methanol, ethyl formate, dichloromethane, thiophene and tetrahydrofuran. The antioxidant activities, including free radical scavenging activity and ferric reducing power of the PA extracts were investigated. The synthetic antioxidants BHA and BHT were used as positive controls. The dichloromethane extract of PA showed superior antioxidant properties. The chemical compositions of the extracts were determined by GC-MS, and further proved that the dichloromethane extract had the best antioxidant characteristics. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
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