1. State Key Laboratory of Marine Resource Utilization in South China Sea Hainan University Haikou 570228 P. R. China
2. College of Tropical Crops Hainan University Haikou P. R. China
3. Shimadzu Corporation Guangzhou branch Guangzhou P. R. China
4. College of Food Science and Engineering Hainan University Haikou P. R. China