1. Institute of Analytical Science Shaanxi Provincial Key Lab of Electroanalytical Chemistry Northwest University 229 North TaiBai Road Xi'an 710069 China
2. Institute of Apicultural Research Chinese Academy of Agricultural Sciences Beijing 100093 China
3. Risk Assessment Laboratory for Bee Products Quality and Safety of Ministry of Agriculture Beijing 100093 China
4. Institute of Food Science and Technology Chinese Academy of Agricultural Sciences Beijing 100081 China