The phrase "a small drop of solution" is correct and usable in written English.
It can be used in scientific or technical contexts, particularly when discussing measurements or quantities of liquids.
Example: "To prepare the experiment, add a small drop of solution to the test tube and mix thoroughly."
Alternatives: "a tiny amount of solution" or "a little drop of solution."
A small drop of a solution of known osmolarity is put on the wet junction of the thermocouple, and the thermocouple is inserted into the chamber.
A small drop of aqueous solution (50 100 μL) containing the Janus particles at low concentration was applied to a microscope coverslip, and the objective was inserted directly into the drop.
The nerve segment was first fixed for a few seconds in a small drop of fixative solution (glutaraldehyde 2.5%and0.5%5% sucrose in 0.1 M Sörensen phosphate buffer, pH 7.4) to maintain the nerve straight in order to sustain specimen's orientation; then, the specimen was placed in an Eppendorf tube with the fixative solution for 6 8 hours.
Specimens for TEM were prepared by spreading a small drop of the sample solution onto a 400 mesh copper grid.
For TEM imaging, a small drop of the sample solution was dispersed onto a specific 3-mm carbon-coated copper grid and was dried in a desiccator at room temperature before TEM imagining.
After the water evaporating by exposing to air at room temperature, the sample was inversely covered on a small drop of hydrodated phosphotungstate (PTA) solution with a mass fraction of 2%.
A small drop of sample in aqueous solution was deposited on carbon-coated copper grids (300 mesh) without any staining.
After water evaporated, the sample was inversely covered on a small drop of 2% hydrodated phosphotungstate (PTA) solution.
Thus, the spreading of a small drop of ink is rather closely described by the particular solution, in which C is a constant determined by the total number of particles in the ink drop.
