The phrase "a certain amount of liquid" is correct and usable in written English.
It can be used when referring to an unspecified quantity of liquid in various contexts, such as cooking, science, or general descriptions.
Example: "To make the sauce, you will need to add a certain amount of liquid to achieve the desired consistency."
Alternatives: "an unspecified quantity of liquid" or "a specific volume of liquid".
The whey is drained but not pressed from the curds, thus leaving a certain amount of liquid.
Some people seemed to thoroughly enjoy what they saw and heard, while others cringed and suggested that everybody's favourite mild-mannered chef - and Norwich's joint majority shareholder - might have been fuelled by a certain amount of liquid refreshment.
As much important as keeping a hydride buffer vessel pressure in a hydride bed system, similar tendency was studied in the tank efflux system; i.e., to keep the secondary vessel height there needs a certain amount of liquid flow from the upper tank and the tank height difference.
A certain amount of liquid is trapped inside the wood of the barrel as bourbon ages, and Jim Beam has a modern process to release the whiskey from the barrel wood.
Remember you can only have a certain amount of liquid in your carry-on bag.
Subsequently, a certain amount of liquid-polyacrylonitrile (LPAN) were mixed with Si@SiO2 composite and ground in a QM-3SP2 planetary ball mill for 10 h.
Once an exchange has a certain amount of liquidity, it is likely to attract more trading volume, even if there are more efficient, but less liquid, alternatives.
Under the new FRA regulations, railroads will also be required to report on the frequency and pathways of shipments of all "high-hazard flammable trains," which are loaded with a certain amount of flammable liquid.
Hydrogen sulfide (H2S) undergoes decompression during petroleum extraction from oil reservoirs, during which a certain amount of H2S-scavenging liquid compound is added to absorb H2S in the pipelines.
Aside from providing a certain amount of lubrication, these liquids also help dissolve encrusted accretions of metal oxide and dust.
A certain amount of pressure is applied to an amount of liquid containing protein ligand complexes as well as free ligand and protein.
