Collocations for concentration - noun

deep, great, intense
absolute, total
a look of total concentration on her face

good
poor
exclusive

demand, need, require
The game requires great concentration.

lose
break, disturb
Don's voice from outside broke my concentration.

lapse (esp. AmE)

concentration on
his concentration on his writing

a lack of concentration
a lapse in concentration, a lapse of concentration
One momentary lapse in concentration could prove fatal.

powers of concentration
She has great powers of concentration for a child her age.

elevated, great, heavy, high, large
The greatest concentration of traffic is downtown.

low
varying
calcium, glucose, oxygen, salt, etc.
Evaporation gradually increases the salt concentration of the water.

geographical

increase
decrease, reduce
calculate, determine, estimate

increase, rise
The concentration of nitrates in the drinking water has risen in recent years.

decrease, fall