A sample acquiring device comprising at least one inlet for receiving a body fluid sample, at least one capillary sample reception cavity in capillary communication with said at least one inlet, a first pathway in communication with said at least one inlet and a first measurement cavity, and a second pathway in communication with said at least one inlet and a second measurement cavity, the second measurement cavity being separate from said first measurement cavity, wherein the first pathway and the second pathway are in communication with said at least one capillary sample reception cavity such that spontaneous flow from the capillary sample reception cavity is prevented and such that body fluid sample may be forced from the capillary sample reception cavity into a first centrifugation cavity of said first pathway and a first centrifugation cavity of said second pathway by subjecting the sample acquiring device to a first centrifugation, wherein said first centrifugation cavity of said first pathway is in capillary communication with a first capillary cavity of said first pathway and said first centrifugation cavity of said second pathway is in capillary communication with a first capillary cavity of said second pathway, such that at least a fraction of said body fluid sample in said first centrifugation cavity may be transferred from said first centrifugation cavities to said first capillary cavities, wherein a precipitation agent is provided in said first capillary cavity of said second pathway, wherein said first capillary cavity of said first pathway is in communication with a second centrifugation cavity of said first pathway and said first capillary cavity of said second pathway is in communication with a second centrifugation cavity of said second pathway, such that spontaneous flow from said first capillary cavities is prevented and such that said at least a fraction of said body fluid sample from the first capillary cavities may be forced from the said first capillary cavity of said first pathway and into a second centrifugation cavity of said first pathway and from said first capillary cavity of said second pathway to a second centrifugation cavity of said second pathway by subjecting the sample acquiring device to a second centrifugation, wherein said second centrifugation cavity of said first pathway is in capillary communication with a second capillary cavity of said first pathway and said second centrifugation cavity of said second pathway is in capillary communication with a second capillary cavity of said second pathway, such that at least a fraction of said body fluid sample in said second centrifugation cavities may be transferred from said second centrifugation cavities to said second capillary cavities, wherein said second capillary cavity of said first pathway is in communication with a transfer cavity of said first pathway and said second capillary cavity of said second pathway is in communication with a transfer cavity of said second pathway, such that spontaneous flow from said second capillary cavities is prevented and such that at least a fraction of said body fluid sample in said second capillary cavities may be forced from said second capillary cavity of said first pathway into said first measurement cavity via said transfer cavity of said first pathway and from said second capillary cavity of said second pathway into said second measurement cavity via said transfer cavity of said second pathway by subjecting the sample acquiring device to a third centrifugation, wherein at least one chromophore is provided in said second capillary cavity, in said transfer cavity or in said first measurement cavity of said first pathway, and wherein at least one chromophore is provided in said second capillary cavity, in said transfer cavity or in said second measurement cavity of said second pathway. at least one inlet for receiving a body fluid sample, at least one capillary sample reception cavity in capillary communication with said at least one inlet,