mixtures of organic substances and a medicinal agent are:

In quality control and chemistry, analytical samples are usually mixtures. Understanding the main compound’s assay and the number of impurities or other unwanted substances in the sample is essential ... Coastal seawaters, especially those near large urban centers like Tokyo, are a complex mixture of natural and human-derived substances. This dissolved organic matter, or DOM, is chemically diverse and ... technologynetworks: Discovery Could Speed Up Identification of Best Mixtures for Organic Solar Cells Discovery Could Speed Up Identification of Best Mixtures for Organic Solar Cells pv magazine International: Researchers develop approach to identify best organic solar cell mixtures