1. College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, Shandong 266580, P. R. China
2. Shandong Provincial Key Laboratory of Oil & Gas Storage and Transportation Safety, Qingdao, Shandong 266580, P. R. China
3. Department of Biomedical Laboratory Sciences and Chemical Engineering, Faculty of Engineering and Science, Western Norway University of Applied Sciences, Inndalsveien 28, 5063 Bergen, Norway