"with a high concentration" is correct and usable in written English.
You can use this phrase to express a large quantity or focus of something. For example, "The student studied hard with a high concentration."
Schools with a high concentration of minority students often serve the poorest students.
Brittany is the biggest stock raising region in France, with a high concentration of pig, poultry and dairy farms.
Extreme heat causes the water to evaporate, leaving behind clays and sand soils with a high concentration of minerals.
Lithium often occurs naturally, in trace amounts, in water supplies, particularly in areas with a high concentration of granite.
For instance, neighborhoods with a high concentration of immigrants from the Caribbean seem to report the highest infant mortality figures.
With a high concentration of outstanding colleges and universities, Rhode Island certainly has the talent.
With around 500,000 public sector jobs at risk nationwide, places such as Consett with a high concentration of public sector workers are particularly vulnerable.
Investigators believe the pills involved were made with a high concentration of the chemical PMMA instead of MDMA, usually the main component of ecstasy.
"Areas with a high concentration of betting shops persistently remain within areas with the highest levels of crime in the borough," say officials there.
Investigators believe that the pills involved were made with a high concentration of the chemical PMMA instead of MDMA, usually the main component of ecstasy.
The policy instilled fear and outrage throughout neighborhoods with a high concentration of Muslims, especially in parts of Queens and Brooklyn.
