Devices and methods for mixing liquids by moving said liquids back and forth between a pump and a measuring cell, and physicochemical analysis of the liquids mixed in this manner

A device for mixing liquids, the device comprising:

• a piston pump;
• a multi-way valve;
• a recipient;
• a first duct for connecting the multi-way valve to a chamber of the pump;
• a second duct for connecting a cavity of the recipient to a transfer way of the multi-way valve;
• a plurality of inlet ducts;
• and
• a sampling device,
• wherein each of the inlet ducts is connected to a respective inlet way of the multi-way valve, the multi-way valve being able to selectively occupy:
• sampling positions each establishing a fluidic communication between respective one of the inlet ducts and the chamber so as to be able to move a respective one of the liquids from the inlet duct towards the chamber by the action of a movement of the piston in a first direction, and
• a transfer position establishing a fluidic communication between the chamber and the cavity so as to be able to move the liquids, via the first duct and the second duct, from the chamber to the cavity by the action of a movement of the piston in a second direction and from the cavity to the chamber by the action of a movement of the piston in the first direction,
• wherein at least in one use configuration of the device, the cavity defines a cavity low point and wherein the second duct is connected to the recipient so as to be able to introduce into the cavity or extract therefrom the liquids through the cavity low point,
• wherein the multi-way valve is a main valve, and
• wherein the sampling device includes a sampling valve and a sampling duct connected to a sampling way of the sampling valve, the sampling valve being able to selectively occupy:
• a liquid sampling position establishing a fluidic communication between the sampling duct and a first one of the inlet ducts connected to the respective inlet way of the multi-way valve so as to be able to move the liquid from the sampling duct towards the chamber by the action of a movement of the piston in the first direction when the main valve is in a first sampling position establishing a fluidic communication between the first one of the inlet ducts and the chamber, and
• an air sampling position establishing a fluidic communication between an open way of the sampling valve and the first one of the inlet ducts connected to the respective inlet way of the multi-way valve, the open way being exposed to surrounding air, so as to be able to move the surrounding air towards the chamber by the action of a movement of the piston in the first direction when the main valve is in the first sampling position.