Mobile voltammetric analysis

A computer program product comprising a computer-readable medium upon which instructions are recorded that are executable by a mobile computing device connectable to a voltammetric cell via a circuit configuration,

• the voltammetric cell for receiving a sample of the analyte, and comprising first and second electrodes,
• the circuit configuration comprising a resistor and a capacitor for connecting the mobile computing device to the voltammetric cell, and
• the mobile computing device having a microprocessor, one or more memory components comprising a program and data store accessible to the microprocessor, and an audio interface which comprises an audio signal output having first and second channels and an audio signal input, wherein the audio interface is operable under control of the microprocessor, and is connectible, in use, to the voltammetric cell with the first channel of the audio signal output being connected to the first electrode, the second channel of the audio signal output being connected to the second electrode via the resistor, and the audio signal input being connected to the second electrode via the capacitor,
• the instructions being configured such that, when executed by the microprocessor, the mobile computing device is caused to implement steps of:
• generating an output voltage waveform between the first and second channels of the audio signal output, the output voltage waveform comprising a time-varying voltammetric driving potential and an AC perturbation;
• simultaneously with generating the output voltage waveform, capturing an input voltage waveform received at the audio signal input;
• and
• recording within the data store the input voltage waveform as a voltammetric response waveform indicative of a characteristic of the analyte.