Clinical labs use static and centrifugal concentrators to prepare samples for a variety of tests. Proteins in urine need to be concentrated prior to gel and immunofixation electrophoresis for diagnosis of multiple myeloma, amyloidosis and other plasma cell disorders. Bacterial antigens in urine and fungal antibodies in serum are also concentrated to improve the sensitivity of immunoassay tests. Centrifugal ultrafiltration devices have been used to separate free drugs and hormones from those bound to serum proteins. Vivaproducts also supplies a selection of centrifuges for use with our concentrators or for general laboratory purposes.