High Dilution Ratio by Successively Preparing and Diluting Chemicals

A method for providing a plurality of diluted solutions, comprising:

• determining a respective target dilution ratio for each of a plurality of mixing vessels;
• and
• for each mixing vessel of the plurality of mixing vessels, substantially simultaneously across the plurality mixing vessels:
• placing a first volume of a source solution in the mixing vessel;
• adding a second volume of a liquid to the mixing vessel, to form a first diluted solution having a first dilution ratio;
• in response to the first dilution ratio being insufficiently dilute for the target dilution ratio, dispensing a first waste volume of the first diluted solution;
• adding a third volume of the liquid to the mixing vessel to form a second diluted solution having a second dilution ratio;
• in response to the second dilution ratio being insufficiently dilute for the target dilution ratio, dispensing a second waste volume of the second diluted solution;
• and
• adding a fourth volume of the liquid to the mixing vessel to form a third diluted solution having a third dilution ratio.

A solutions dispensing system, comprising:

• a plurality of mixing vessels;
• a plurality of source inlet valves, each configured to provide a source solution to a respective one of the mixing vessels;
• a plurality of liquid inlet valves, each configured to provide a liquid to the respective one of the mixing vessels;
• a plurality of outlet valves, each configured to dispense from the respective on of the mixing vessels;
• and
• a controller, communicating with the source inlet valves, the liquid inlet valves and the outlet valves, and configured to:
• dispense first volumes of the source solution from the source inlet valves into the mixing vessels;
• dispense second volumes of the liquid from the liquid inlet valves to the mixing vessels, to form first diluted solutions having first dilution ratios;
• dispense first waste volumes of the first diluted solutions from the mixing vessels through the outlet valves;
• dispense third volumes of the liquid from the liquid inlet valves to the mixing vessels to form second diluted solutions having second dilution ratios;
• dispense second waste volumes of the second diluted solutions from the mixing vessels through the outlet valves;
• and
• dispense fourth volumes of the liquid from the liquid inlet valves to the mixing vessels to form third diluted solutions having third dilution ratios,
• wherein the first, second and third dilution ratios are individually set to each mixing vessel of the plurality of mixing vessels, and wherein each successive dilution operation is performed upon the plurality of mixing vessels substantially simultaneously.