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Discover LudwigThe phrase "The concentrations" is correct and usable in written English.
It can be used when discussing the levels or amounts of substances in a solution or mixture.
Example: "The concentrations of the various chemicals in the solution were measured to ensure accuracy."
Alternatives: "The levels" or "The amounts".
Dictionary
The concentrations
noun
The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated.
Exact(59)
"The concentrations of arsenic in the hair taken from Napoleon after his death were much higher," the scientists wrote.
The concentrations of proteins were determined spectrophotometrically.
The concentrations of mercury in Chinese coals.
The concentrations of cathodic electrolyte were optimized.
The concentrations of constituents varied seasonally.
The concentrations are expressed in moles per kilogram of solution.
The concentrations of these proteins are also different among layers.
The concentrations declined generally from December to March.
The concentrations were based on the amounts of QDs used.
The concentrations in parts per million are indicated with arrows.
The concentrations were 0.0468 and 0.0476 mg/mL, respectively.
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CEO of Professional Science Editing for Scientists @ prosciediting.com