The Quality Control Reference Material portfolio is a unique collection of standards and mixtures. These products allow the user to evaluate and benchmark their chromatography system before analysis of critical material. The products in the portfolio are all specially formulated based on the expertise of Waters scientist. The AutoPurification Dye Standard contains 3 compounds including Thionin, Thioflavin, and Crystal Violet. This standard mix is used to confirm the benchmark performance of a Preparative/Purification System through fraction collection. This particular QCRM is specially formulated to allow the user to verify correct fraction collection. This test is highly valuable to perform upon first use/installation, and any time the system has not been used or has had any changes.