series by Applied Microspheres is a product line consisting of polystyrene particle suspensions with precisely defined numbers of particles. It is designed for pharmaceutical quality control laboratories to facilitate calibration and validation processes for liquid particle counters. Laboratories observing QC protocols meeting the US, Japanese and Korean Pharmacopeia requirements, are obliged to use standards supplied or defined by the US, Japanese or Korean Pharmacopeia organisations to perform mandatory (6 monthly) tests. PharmaCount™ US, Pharma- Count™ JP and PharmaCount™ Bi-Cal meet the specifications of these standards and are therefore ideally suited to perform (intermediate) tests to ensure that their instruments are always correctly calibrated, thereby safeguarding USP, JP and KP compliancy.