1. Dodecanol abietate succinic anhydride was synthesized from abietic acid. The structures of products were characterized by spectrum of IR, HNMR and MS.

2. Objective To develop a method for identifying abietic acid illegally added in Gujinwan Capsules.

3. The kinetics of thermal oxidation of rosin and abietic acid absorbed on the polyethylene film were respectively studied. The kinetic equation of heat oxidation was determined by UV spectrophotometry.

4. Resin derived from abietic acid containing matter secreted from high plants to form retenes under diagenesis is a well-known geochemical fact.

5. Results The HPLC-DAD method could quickly identify abietic acid added in Gujinwan Capsules.

6. The result showed that the oxidation reaction of abietic acid is first-order reaction during the initial period but then isn't first-order reaction because of oxidant film.

7. It is not necessary to use natural pure abietic acid and dehydroabietic acid and they are not easily obtained as standard substances.

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8. Abietinylglycine, a surface active agent, was synthesized by the reaction of glycine and abieting chloride using abietic acid as starting material.

9. Conclusion The method is simple and accurate, which can be used for the identification of abietic acid illegally added in Gujinwan Capsules.

10. Results showed that the RFAs in DCS of Masson pine CTMP were mainly composed of oleic acid, linoleic acid, DHA, pimaric acid, abietic acid and oxidized products of DHA.