In addition, the surface of each black material sample was examined using a FE-SEM (4500S, Hitachi, Tokyo, Japan).
As no CRM (certified reference material) sample was available for polyether ionophores at the trace level, the accuracy of the LC-MS/MS method was determined through the recovery of known amounts of the analytes added to a blank matrix.
Material samples are available from the Moon and possibly, in the form of a few meteorites, from Mars.
It can be concluded as well from the results obtained in the current work that the mean values of 226Ra, 232Th, and 4K of building material samples are all well below the world average.
People's sensorial or psycho-physical judgments (by touch) of the roughness, softness, slipperiness and warmth of 37 material samples are reported as well as their affective judgments, such as how pleasurable, exciting, indulgent, the samples felt.
In the ISA-TAB-Nano framework, all material samples are viewed as formulations having one or more chemical components (e.g., nanoparticles, small molecules, solvent medium, etc).
The "initial laboratory test of multiple air, water and material samples were negative for any organic compounds such as poisons or other toxic material," an Isaf spokesman said.
Theoretical studies on graphene began a long time before the real material samples were obtained.
The ground and screened material samples were analyzed in a Micromertitics ASAP 2010.
Moisture content (% raw material): samples were put in ventilated oven at 105 °C until a constant weight was achieved.
