The number of samples to analyze, the sample matrix, and the concentration range of the sample decide the choice of the procedure. To quantify samples with an unknown or complex matrix, the standard ...

Refinery samples are combinations of a range of hydrocarbons (aromatic, polycyclic, aliphatic, and more) created from the process of fractionated distillation of crude oil. Their viscosities, ...

This is a preview. Log in through your library . Abstract Designing permanent sample plots is a key issue in forestry where long-term data are required to assess the sustainability of forest logging.