at a concentration of

USAGE SUMMARY

"at a concentration of" is correct and usable in written English.
It is typically used to describe the amount of a particular substance that is present in a given mixture. For example, "The solution contained salts at a concentration of 1.5%.

✓ Grammatically correct

Science

News & Media

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

At a concentration of four-tenths, the drinker collapses into coma.

The New Yorker

Other additives which might be used in future operations include hydrochloric acid, typically at a concentration of 0.125% or biocide at a concentration of 0.0005%, which can be used if needed to purify the water used in the process.

The Guardian

Half of all gasoline contains some ethanol, which ordinary cars can burn at a concentration of up to 10percentt.

The New York Times

Permethrin concentrations were determined at a concentration of 100.0 μM.

Chemistry Central Journal

Acetoin was added at a concentration of 0.5 g/L.

AMB Express

CTX was detected at a concentration of 50 μg/ml.

Toxicology

Maximum inhibition was achieved at a concentration of 60 μM.

Biochimie

Mephedrone was found in his blood at a concentration of 0.50 mg/l and in his urine at a concentration of 198 mg/l.

Wikipedia

All primers were used at a concentration of 10 µM.

Plosone

Primers were used at a concentration of 250 nM.

Plosone

All siRNAs were used at a concentration of 30 nM.

Plosone

Expert writing Tips

Best practice

When describing experimental conditions, always specify the units of measurement (e.g., molar, mg/mL) after stating a "concentration" to ensure clarity and reproducibility.

Common error

Avoid confusing molarity (mol/L) with mass concentration (g/L). Ensure you're using the correct units and conversion factors when preparing solutions "at a concentration of" a specific value.

Linguistic Context

The phrase "at a concentration of" functions as a prepositional phrase modifying a noun. It provides essential information about the quantity of a substance in a mixture, solution, or compound. Ludwig AI confirms this is correct and usable in written English.

Expression frequency: Very common

Frequent in

Science

86%

News & Media

10%

Wiki

3%

Less common in

Formal & Business

1%

Encyclopedias

0%

Reference

0%

Ludwig's WRAP-UP

In summary, "at a concentration of" is a prepositional phrase primarily used to specify the precise amount of a substance within a solution or mixture. Predominantly found in formal and scientific contexts, it ensures clarity and accuracy in technical writing. Ludwig AI confirms its correctness and usability. When using this phrase, remember to specify measurement units and avoid confusing different concentration metrics. Alternative phrases include "with a concentration of" or "at a level of". It is a very common phrase mainly found in "Science" contexts.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

with a concentration of

Replaces "at" with "with", subtly shifting the focus to the substance possessing the concentration rather than the state of being at a specific level.

containing a concentration of

Emphasizes the inclusion of a substance within something else, highlighting containment.

having a concentration of

Uses "having" to describe the state of possessing a particular concentration, which is slightly more formal.

in a concentration of

Replaces "at" with "in", which gives a slightly different nuance. It emphasizes being enclosed or contained within that specific concentration.

present at a concentration of

Highlights the presence of a substance at a particular concentration, adding emphasis on its existence.

at a level of

Substitutes "concentration" with "level", broadening the scope to include non-chemical contexts.

with concentration at

This alternative rearranges the sentence structure, placing "with" at the beginning and subtly altering the emphasis.

maintained at a concentration of

Suggests that the concentration is being actively kept at a specific level.

exhibiting a concentration of

More formal; suggests the concentration is a property being displayed or shown.

standardized to a concentration of

Indicates the concentration has been adjusted to meet a specific standard or requirement.

FAQs

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

Use "at a concentration of" to specify the amount of a substance within a solution or mixture. For example, "The drug was administered "at a concentration of" 5 mg/mL."

What are some alternatives to saying "at a concentration of"?

You can use phrases like "with a concentration of", "at a level of", or "in a concentration of" depending on the nuance you want to convey.

Is it correct to say "the concentration is at" instead of "at a concentration of"?

While understandable, "the concentration is at" is less formal and less precise than ""at a concentration of"". The latter clearly indicates the specific amount present.

What is the difference between "at a concentration of" and "at the level of"?

"At a concentration of" typically refers to a substance's amount in a solution. "At the level of" can be broader, referring to general levels or thresholds, not necessarily concentrations in solutions. For example, in sports performance it's common to say "at the level of champions".