"density of the samples" is a correct and usable phrase in written English.
You could use it in a sentence such as: "The density of the samples varied significantly between the different locations."
Dielectric constant of the sintered AlN samples is dependent on the relative density of the samples.
The surface roughness, porosity and density of the samples were measured.
Figure2 shows the dependence of apparent density of the samples on sintering temperature.
In this research, the relative density of the samples varies from 78 to 91%.
After the deposition of CdS, the photocurrent density of the samples increased remarkably.
(a) Field emission current density of the samples as a function of the electronic field.
The percentage porosity and density of the samples are presented in Table 4.
Density of the samples was determined by a helium pycnometer (Micromeritics AccuPyc 1340).
To investigate the antimicrobial activity, optical density of the samples was recorded at 600 nm [34].
The increase of FNS content improved particle packing as well as density of the samples.
Table 4 shows the absolute density and the bulk density of the samples.
