A system (100, 200, 300) for blending solutions, the system (100, 200, 300) comprising: a switch valve (106, 212) capable of flowing at least one solution; a low pressure pump (108, 210) for pumping the at least one solution from the switch valve (106, 212); at least one container (104, 202, 204, 206) for storing said at least one solution, said at least one container (104, 202, 204, 206) being connected to the low pressure pump (108, 210) through the switch valve (106, 212); the system further comprising and being characterised by: a T-joint (110, 214) capable of receiving the at least one solution from the low pressure pump (108, 210) and blending the at least one solution with a buffer solution, wherein the T-joint (110, 214) is connected to a container (112, 208) holding the buffer solution through at least one direct connection; and a high pressure pump (114, 216) for collecting a blended solution, wherein: the T-joint is between the low pressure pump (108, 210) and the high pressure pump (114, 216), said high pressure pump (114, 216) and said low pressure pump (108, 210) being configured such that a difference between pressures created by the low pressure pump (108, 210) and the high pressure pump (114, 216) creates a suction pressure for allowing the buffer solution to flow from the container (112, 208) into the T joint (110, 214). a switch valve (106, 212) capable of flowing at least one solution; a low pressure pump (108, 210) for pumping the at least one solution from the switch valve (106, 212); at least one container (104, 202, 204, 206) for storing said at least one solution, said at least one container (104, 202, 204, 206) being connected to the low pressure pump (108, 210) through the switch valve (106, 212); the system further comprising and being characterised by: a T-joint (110, 214) capable of receiving the at least one solution from the low pressure pump (108, 210) and blending the at least one solution with a buffer solution, wherein the T-joint (110, 214) is connected to a container (112, 208) holding the buffer solution through at least one direct connection; and a high pressure pump (114, 216) for collecting a blended solution, wherein: the T-joint is between the low pressure pump (108, 210) and the high pressure pump (114, 216), said high pressure pump (114, 216) and said low pressure pump (108, 210) being configured such that a difference between pressures created by the low pressure pump (108, 210) and the high pressure pump (114, 216) creates a suction pressure for allowing the buffer solution to flow from the container (112, 208) into the T joint (110, 214). a T-joint (110, 214) capable of receiving the at least one solution from the low pressure pump (108, 210) and blending the at least one solution with a buffer solution, wherein the T-joint (110, 214) is connected to a container (112, 208) holding the buffer solution through at least one direct connection; and a high pressure pump (114, 216) for collecting a blended solution, wherein: the T-joint is between the low pressure pump (108, 210) and the high pressure pump (114, 216), said high pressure pump (114, 216) and said low pressure pump (108, 210) being configured such that a difference between pressures created by the low pressure pump (108, 210) and the high pressure pump (114, 216) creates a suction pressure for allowing the buffer solution to flow from the container (112, 208) into the T joint (110, 214).