The phrase "add a small volume" is correct and usable in written English.
It can be used when instructing someone to include a minor amount of a substance or material in a mixture or solution.
Example: "To complete the recipe, please add a small volume of olive oil to the mixture."
Alternatives: "include a little amount" or "insert a minor quantity".
After 4 hours, wash the cells twice with PBS and add a small volume (3 ml) of culture medium to avoid excessive dilution of autocrine growth factors produced by the RCE cells.
In contrast to aqueous procedures, we do not adjust the first point to a specific pH and only rarely will initially add a small volume of the opposite titrant.
Water does not compress, nor does the coconut hull stretch appreciably; so if the coconut is full and you add a small volume of steel, via the tip of the knife blade, there is no place for the water to go except out, by any means necessary!
Schöniger flask combustion involves a special Erlenmeyer flask to which is added a small volume of a suitable solution (often a dilute sodium carbonate or sodium hydroxide solution) that absorbs and retains the inorganic analytes.
The level II composite was obtained by adding a small volume fraction (vf) of the ball-milled level I composite to Mg using the powder metallurgy route followed by microwave-assisted rapid sintering and hot extrusion.
Chemical reduction, in order to generate the reduced Fe(II)/Fe(III) in the FeS clusters, was performed by adding a small volume of anaerobic sodium dithionite solution to the protein solution under a weak stream of argon gas (20-fold excess dithionite with respect to the protein).
Osmotic stress (0.4 M NaCl) was produced by adding a small volume of concentrated NaCl solution to the yeast culture 10 min before cross-linking with formaldehyde.
To examine the average size of these particles, a bright-field microscopy technique was performed using a Leica DMLM microscope by adding a small volume of spheres on the surface of a microscope slide.
The ferrous form was obtained by adding a small volume (2 5 μL) of a fresh sodium dithionite solution (10 20 g/L Na2S2O4·2H2O) to 40 μL of a deoxygenated protein solution.
Co II Cbl and Co II Cbi+ were prepared by adding a small volume of saturated HCOOK to degassed solutions of H2OCbl+ and (H2O 2Cbi2+, respectively, and the progress of the reduction was monitored spectrophotometrically.
Therefore, we performed a chromatin immunoprecipitation analysis for eight specific histone modifications; H3K9ac, H3K14ac, H4K8ac, H3K4me1, H3K4me3, H3K36me3, H3K79me2 and H3K79me3; before and after osmotic stress (0.4 M NaCl) produced by adding a small volume of a concentrated NaCl solution to the yeast culture 10 min before cross-linking with formaldehyde.
