FIG. 13.

Simulation results of the concentration at the center divided by the initial reactant concentration for a 50 μm channel with various sample jet diameters and diffusion coefficients. The coefficient of $D=2\times {10}^{-9}{\mathrm{m}}^2/\mathrm{s}$ is similar to the diffusion coefficient for an ion such as iodide, while $D=6\times {10}^{-10}{\mathrm{m}}^2/\mathrm{s}$ is close to the coefficient for glucose.