The phrase "level of impurities" is correct and usable in written English.
You can use it when referring to the measure of the amount of impurities present in something. For example, "The level of impurities in the water must be reduced in order to meet environmental standards."
Extraction is often followed by refining, in which the level of impurities is brought lower or controlled by pyrometallurgical, electrolytic, or chemical means.
A base pressure less than 10−5 Torr was achieved to decrease the level of impurities in the chamber.
The low level of impurities adsorbed on the obtained surfaces was confirmed by diffuse reflectance FT IR (DRIFT) spectra.
The high level of impurities, stacking faults and nanosized twins govern the formation of homojunctions and heterojunctions in crystals.
Moreover, the quality control analysis revealed that the level of impurities (proteins, endotoxins, sRNA) in the final pre-miR-29 sample was negligible.
The higher quality of the ALD layer in terms of low defect density and low level of impurities with respect to the solution processed approach has been highlighted by electrochemical characterization and XPS analysis.
Numerical solutions are used to demonstrate the dependence of the solidification process upon the level of impurity and other parameters.
The mechanical behavior of the ceramic was identical in tension and compression, for a material with a given level of impurity.
The effects of the replacement percentage, the PAG kind, the level of impurity, and the time-related variations on the quality of the concrete are discussed.
The particular varna in which a jati is ranked depends in part on its relative level of "impurity," determined by the group's traditional contact with any of a number of "pollutants," including blood, menstrual flow, saliva, dung, leather, dirt, and hair.
Continuous NF operations were carried out for various bleed ratios to investigate the effects of bleed on the lactate recovery and level of impurity represented by sulfate in this study.
