Citation: Hong Wang, Xue Jiang Wang, Jian Fu Zhao, Ling Chen. Toxicity assessment of heavy metals and organic compounds using CellSense biosensor with E.coli[J]. Chinese Chemical Letters, ;2008, 19(2): 211-214. doi: 10.1016/j.cclet.2007.10.053 shu

Toxicity assessment of heavy metals and organic compounds using CellSense biosensor with E.coli

State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China

Received Date: 28 August 2007

Fund Project: This work was supported by the National Natural Science Foundation of China (No.20707014) and the Program for Young Excellent Talents of Tongji University.

A new strategy using an amperometric biosensor with Escherichia coli(E.coli) that provides a rapid toxicity determination of chemical compounds is described.The CellSense biosensor system comprises a biological component immobilized in intimate contact with a transducer which converts the biochemical signal into a quantifiable electrical signal.Toxicity assessment of heavy metals using E.coli biosensors could be finished within 30 min and the 50% effective concentrations (EC₅₀) values of four heavy metals were determined.The results shows that inhibitory effects of four heavy metals to E.coli can be ranked in a decreasing order of Hg²⁺ > Cu²⁺ > Zn²⁺ > Ni²⁺, which accords to the results of conventional bacterial counting method.The toxicity test of organic compounds by using CellSense biosensor was also demonstrated.The CellSense biosensor with E.coli shows a good, reproducible behavior and can be used for reproducible measurements.
- Whole-cell biosensor,
- Heavy metal,
- Organic compounds,
- Toxicity
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