The Performance of Silicon Based Sensor and its Application in Silver Toxicity Studies

The silicon based sensor is able to detect part per trillion ionic silver in 0.0098% hydrofluoric acid based on the open circuit potential (OCP) measurement. The OCP jump of 100 ppt ionic silver solution is up to 120 mV. The complex agent can effectively suppress the ionic silver concentration and suppress the OCP signal. The ability of complex agent to suppress the OCP signal depends on the formation constant of the complex with silver. The complex adsorbed on the sensor surface induces a second OCP jump, the height of the second jump depends on the formation constant of the complex. The MINEQL chemical equilibrium modeling program is used to calculate the ionic silver concentration when complex agent presents, a discrepancy is found between the MINEQL simulation result and the OCP signal of the silicon based sensor. The toxicity of ionic silver to C. dubia is studied parallel to the OCP signal of silicon based sensor. Less toxicity is found when the complex agent is present similar to the OCP signal. Another discrepancy is found between the MINEQL simulation and the toxicity test when MINEQL simulation is used to predict and control the ionic silver concentration. The data from both biosensor C. dubia and silicon based sensor support each other and both are not in agreement with MINEQL simulation prediction.

Grantor dc:publisher

University of North Texas

Year dc:date

2000

Author dc:creator

• Peng, Haiqing

Contributors dc:contributor

• Chyan, Oliver M. R.
• Golden, Teresa D.

• Silver -- Toxicology.
• Biosensors.
• toxicity
• MINEQL
• ionic silver
• silicon based sensor
• complex agent

Statement dc:rights

• Public
• Copyright
• Peng, Haiqing
• Copyright is held by the author, unless otherwise noted. All rights reserved.

Language dc:language

English

Identifier

oclc: 49962818
untcat: b2375604
https://digital.library.unt.edu/ark:/67531/metadc2613/
ark: ark:/67531/metadc2613

OAI identifier oai:identifier

info:ark/67531/metadc2613