Mixtures of phytoplankton pigments useful for QA/QC of pigment analyses

DHI mixed pigments are suitable for: 

•  Controlling how well your HPLC elutes and separates the pigments
•  Identifying the different pigments by the relative retention times and the absorption properties
•  Controlling the precision by repeated injections 
•  Recording the separation of the critical pairs
•  Controlling the accuracy over time to validate the calibration and your method

Repeated injections can be used to check the method precision and accuracy as part of the method validation. 

Please note that the mixed pigments cannot be used for calibration as the concentration of the individual pigments in the mixture is unknown. 

Choose between three types of mixed pigments in vials with two different concentrations:

• PPS-MIX-1: especially suitable when analyzing common pigments in phytoplankton samples. The chlorophyll a concentration is 3-5 μg/mL
• PPS-MIX-2: especially suitable when analyzing samples with pigment concentrations near the detection limit. The chlorophyll a concentration is 0.1-0.2 μg/mL
• PPS-MIX-3: contains fewer pigments distributed across the chromatogram. It is particularly useful for simpler analyses where it is not necessary to quantify all pigments present in aquatic samples. The chlorophyll a concentration is 3-5 μg/mL