"desired concentration" is a correct and usable phrase in written English.
You could use it when expressing the desired amount of a given substance in a mixture or solution. For example, "Mix 3 liters of water and a desired concentration of salt."
The supernatant was concentrated to the desired concentration using polyethylene glycol PEG-60000) solution.
Following another incubation with glutathione-sepharose beads to remove traces of free GST, the proteins were concentrated to the desired concentration (Centricon 3 K, Millipore).
The dialyzed protein was concentrated in Micron columns (Millipore) and adjusted to the desired concentration.
Lobster soup with spring vegetables, another of Mr. Féau's exercises in simplicity, delivered the desired concentration of shellfish flavor.
The oils are mixed with alcohol to reach the desired concentration.
Growth curve and spot assays were conducted in minimal growth medium MMB liquid or agarized12 and supplemented with the indicated compound (Sigma-Aldrich) at the desired concentration.
N2H4 and H2O2 were pumped to the anode and cathode at desired concentration and flow rate by individual peristaltic pumps and silicone tubes.
Water is pumped in to flush out the paste and to help in diluting it to the desired concentration for sauce.
Medium was replaced with DMEM supplemented with 4% of FBS containing the photosensitizer at the desired concentration and cells were incubated for 18 hours at 37 °C.
Calibration curves were prepared by dilution of Pc stock solution in DMF at desired concentration in cell lysate (300 µL) diluted in DMF (200 µL).
The catalytic agents in desired concentration were used during the operation.
