Patent ID: 8808541

Claim:
A tray and dialysis cell combination comprising: a horizontally extending tray having a top and a bottom, said top having a plurality of recesses having a bottom and a plurality of sides; a plurality of dialysis cells positioned within but manually removeable from at least some of said recesses, each of said dialysis cells including: a. a housing including a top and divided into a serum portion and a buffer portion; b. said serum portion including a serum cavity for holding a serum specimen, said serum cavity being substantially cylindrical having a substantially horizontal central axis, said serum portion further including a serum specimen inlet for introduction of a serum specimen from exterior to said housing into said serum cavity, serum inlet extending from an opening formed on said housing top to said serum cavity for the gravity introduction of a serum through said serum inlet into said serum cavity; c. said buffer portion including a buffer cavity for holding a buffer, said buffer cavity being substantially cylindrical having a substantially horizontal central axis, said buffer portion further including a buffer inlet for introduction of a buffer from exterior to said housing into said buffer cavity, said buffer inlet extending from an opening formed on said housing top to said buffer cavity for the gravity introduction of a buffer through said buffer inlet into said buffer cavity; d. said serum cavity positioned adjacent to said buffer cavity with the serum portion's center axis coincident with buffer cavity's center axis so that said serum cavity and said buffer cavity form a single substantially cylindrical central chamber within said housing also having a substantially horizontal central axis; and e. a dialysis membrane sandwiched between said serum portion and said buffer portion having a porosity allowing for the passage of molecules smaller than a predetermined molecular weight, said dialysis membrane vertically positioned between serum portion and said buffer portion to separate said chamber into said serum cavity and said buffer cavity, said dialysis cells constructed so that when said buffer inlet and said serum inlet are positioned at the top of said dialysis cells for the gravity introduction of a serum through said serum inlet into said serum cavity and for the gravity introduction of a buffer through said buffer inlet into said buffer cavity, said cylindrical central chamber's central axis being substantially horizontal and said dialysis membrane being positioned substantially vertically and perpendicular to said cylindrical central chamber's central axis.