Lab-on-a-Cable for Electrochemical Monitoring of Phenolic Contaminants

摘要

The "Lab-on-a-Cable" concept,based on scaling bown an electrochemical flow system to a cable platform,is bescribed. The system integrates the analyte collection and of the reaction product in a sealed cylindrical unit,connected to a long shielded cable.An enzymatic assay,involving collection of a phenolic substrate,its mixing with an internally delivered tyrosinase solution,and amperometric detection of the liberated quinone product,is used for illustrating the operation of the flow probe and demonstration its advantages over remote independence of sample conditions such as pH,ionic strength,or natural remote sensors.The "built-in" flow pulsation of the integrated micropump is exploited for a sensitive hydrodynamic-modulation voltammetric detection of hydrazine and peroxide pollutants.