Patent ID: 6551556
Filing Date: 2003-04-22
Classification: B01L,G01N

Abstract:
An automatic DNA purification apparatus, which comprises:a plurality of liquid containers (10) which supply various liquid reagents and DNA containing solutions; a first set of liquid flow passages (21) connected to said liquid containers wherein said liquid reagents stored in said liquid containers (10) are conveyed; a plurality of control valves (22, 24, 25) of which the first control valve (22) controls the transfer of liquid through a first set of liquid flow passages, the second valve (24) blocks a backward flow of liquid discharged from syringes (23) toward the liquid containers, and the third control valve (25) regulates liquid flow between said syringes and injection needles (26); a plurality of syringes (23) connected to said first set of liquid flow passages which intake and discharge quantitatively said liquid reagents, the movement of the pistons connected to said plurality of syringes being controlled by said third control valves; a second set of liquid flow passages connecting said plurality of syringes to a plurality of injection needles (26); transporting mean (30) for moving said plurality of injection needles and/or multi-well plate toward up-down and/or right-left directions and/or in a back and forth direction; a vacuum block (41) wherein liquids contained in said multi-well plate are filtered in vacuum; a plurality of multi-well plate racks (31) which transports said multi-well plates towards up-down directions; a plurality of multi-well plate blocks (40) wherein multi-well plates transported by said multi-well plate rack, are mounted; a process control unit which regulates the operation of said control valves for selection and transfer of said liquid reagents, the operation of said plurality of syringes for quantitative intake and discharge of said liquid reagents, the transfer of said injection needle connected with said syringes among multi-well plate blocks, the sequential transportation of said multi-well plates arranged in said multi-well plate rack, and the operation of said vacuum block, according to computer program.