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This document specifies a set of principles and rules that algae producers, algae products industries, laboratories or other entities that collect algae and algae products samples can follow for the definition of their own sampling programs and sampling protocols. In the context of this document, algae are a functional group that include microalgae, macroalgae, cyanobacteria and Labyrinthulomycetes. The responsible national standardization committee is Working Committee NA 172-00-16 AA "Algen und Algenprodukte" ("Algae and algae products") at DIN Standards Committee Principles of Environmental Protection (NAGUS).