"concentration about" is not a correct phrase in English.
The correct phrase would be "concentration on" or "concentration about". Here are two examples of how to use these phrases correctly: 1. "I need to focus my concentration on studying for my exams." 2. "There is a lot of discussion about the concentration of wealth among the top 1% in society."
In the case of Fetotal concentration, about 88%% of the water samples exceed the maximum allowable limit (WHO 1997) which indicates the fairly high concentrations of iron in the area.
The researchers found that the films had a zinc concentration about a million times higher than the surrounding water.
Oswald, for all her misgivings, writes with revelatory concentration about a little Roman water nymph in the Corinium Museum at Cirencester.
Comic art is, on a very basic level, about concentration, about fitting a complete world in a small space and keeping it coherent and readable.
But Mr. Hill made him a mysterious, contemplative figure who had drawn such a tight circle of concentration about himself that he paid no heed to anyone outside his broodings until he found that a young woman, Tatiana, was obsessed with his enigmatic presence.
However, one RWHS sample showed Pb concentration about 7 times higher than the WHO guideline value.
The experimental region is scanned in a systematic way with gradual concentration about the optimum.
This Ti doping increased the carrier concentration about ten-fold, confirmed with a Mott-Schottky analysis.
A certain concentration (about at the middle of linear range) solution of 11 reference compounds was tested.
Eisenia fetida also removed pentachlorophenol (PCP) from the sludge with artificially increased concentration about 100 mg/kg.
The total concentration (about 10 g l− 1) of the electrolyte is much lower than that of normal anodization electrolyte.
