at concentrations of

USAGE SUMMARY

The phrase "at concentrations of" is correct and usable in written English.
It can be used when discussing the amount or level of a substance in a solution or mixture, often in scientific or technical contexts. Example: "The experiment was conducted at concentrations of 0.1 M and 0.5 M to observe the reaction rate."

✓ Grammatically correct

Science

News & Media

Human-verified examples from authoritative sources

Exact Expressions

59 human-written examples

"We have detected methane at concentrations of 10 parts per billion," says Formisano.

The Guardian

Advanta says testing for biotech material at concentrations of less than 1percentt is technically difficult and expensive.

The New York Times

N2O strongly decreased adhesions at concentrations of 5% or greater.

Gynecological Surgery

Gentamicin and vancomycin were the most used antibiotics, at concentrations of 4 or 2%, respectively.

Journal of Orthopaedics and Traumatology

Glucose was present at concentrations of around 0.1 mM throughout the reactor.

AMB Express

Calibration solutions of standards 1 4 were prepared at concentrations of 2 500 μg/mL.

Botanical Studies

At concentrations of up to 10 mM cinnamic acid growth was observed.

AMB Express

Both AgNPs/AgPyNPs showed their cytotoxicity at concentrations of 50 μg/mL and higher.

Nanoscale Research Letters

Zinc chloride is included in the bath at concentrations of 2--20 μM.

Nano Convergence

NM-302 was tested at concentrations of 1, 10, and 100 mg/kg.

Environmental Sciences Europe

Briefly, cells were resuspended in pre-chilled binding buffer at concentrations of 5 × 106 cells/mL.

Protein & Cell

Expert writing Tips

Best practice

When using "at concentrations of", always specify the units of measurement (e.g., parts per million, milligrams per liter) to ensure clarity and avoid ambiguity.

Common error

Avoid stating concentrations without specifying the units. Saying "the solution was tested at concentrations of 10" is incomplete. Instead, write "the solution was tested at concentrations of 10 mg/L" to provide the necessary context.

Linguistic Context

The phrase "at concentrations of" functions as a prepositional phrase, modifying a verb or noun to specify the amount or level of a particular substance or element. Ludwig AI shows it’s typically used to provide quantitative details in scientific or technical contexts.

Expression frequency: Very common

Frequent in

Science

86%

News & Media

8%

Formal & Business

6%

Less common in

Encyclopedias

0%

Wiki

0%

Reference

0%

Ludwig's WRAP-UP

In summary, the phrase "at concentrations of" is a prepositional phrase used to specify the amount or level of a substance, most commonly in scientific and technical contexts. As Ludwig AI confirms, it's grammatically correct and widely used, making it crucial to provide units of measurement for clarity. Alternative phrases include "with a concentration of" or "at levels of". While both "at concentrations of" and "in concentrations of" are correct, the former is slightly more common. Remember to specify units of measurement and that omitting them is a common error. The phrase is most often used in science-related texts.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

with a concentration of

Uses "with" to indicate the presence of a particular amount, altering the prepositional structure.

in a concentration of

Replaces "at" with "in", focusing on the environment where the concentration exists.

having concentrations of

Employs a participial phrase to describe something possessing a specific amount, shifting the focus.

containing a concentration of

Highlights the inclusion of a substance at a certain amount, changing the emphasis.

present in concentrations of

Specifies that something exists at a defined amount, adding emphasis to its presence.

exhibiting a concentration of

Indicates the display of a certain amount, changing the verb and overall structure.

with levels of

Substitutes "concentrations" with "levels", offering a simpler, more general term.

at a strength of

Replaces "concentrations" with "strength", suitable when referring to potency or intensity.

in proportions of

Uses "proportions" to describe relative amounts, altering the perspective.

at a dosage of

Specifies a measured quantity, particularly relevant in medical or scientific contexts.

FAQs

How do I use "at concentrations of" in a sentence?

Use "at concentrations of" to specify the amount of a substance present in a solution or mixture. For example, "The drug was effective "at concentrations of" 50 mg/mL and higher."

What phrases are similar to "at concentrations of"?

Similar phrases include "with a concentration of", "in a concentration of", or "at levels of". Choose the phrase that best fits the context of your writing.

Is it correct to say "in concentrations of" instead of "at concentrations of"?

While both "at concentrations of" and "in concentrations of" can be used, "at concentrations of" is slightly more common. The choice often depends on the specific context and desired emphasis.

What is the difference between "concentration" and "level" when using "at concentrations/levels of"?

"Concentration" typically refers to the amount of a substance in a specific volume, while "level" can be a more general term for the amount or degree of something. Using "at levels of" may be appropriate when referring to abstract qualities or non-specific measurements.