A company that provides sample preparation instrumentation such as those used for evaporation and extraction.

NCBI Databases – PubMed

A useful database for established concentration ranges for molecules of interest in various species, sample types, and more at NCBI Databases.

Mayo Medical Laboratories

Mayo Clinic Reference Laboratory Services site, useful for finding human reference ranges for a variety of analytes in different biological samples. Searchable by test or by disease state.

Human Atlas Project

A searchable website providing a Tissue-Based Map of the Human Proteome, achieved through antibody-based methods combined with transcriptomics analysis across all major tissues and organs of the human body.


A chemical directory useful for identifying physical and chemical properties, similar or related chemicals, suppliers, etc.