Authentic materials are eligible for love of purity and identity. It is also known as the reference standard. The chromatographic purity of authentic material should only be 80% or greater. However, it is not used in quantitative testing, it is normally used to establish the suitability of the chromatographic system and for spectroscopic testing as an identifier comparator. Authentic materials are normally available in small quantities and mostly acquired by preparative chromatography.
