A method for providing at least a Concentrate of at least a dissolved substance to produce at least one Dialysis Solution, wherein the method includes the following steps: Providing at least a container that contains at least one solid to be dissolved, Supplying Water in the R Ecipiente to dissolve the solid,Drain the Concentrate of the dissolved substance Container and fill it with water, Measuring the concentration of the dissolved Substance or a parameter correlated with Concentration.And delete temporarily or permanently filled with water in the container when the value of the concentration of the dissolved substance falls below a First Threshold Value or parameter value exceeds or falls below a First Threshold Value or when the change in the value of The concentration of the substance dissolved or parameter value exceeds a First Threshold Value.Claim 1: a dialysis machine that has at least a Connector Port in which at least a container comprising a solid to be dissolved is connected or can be connectedWhere the dialysis machine also has at least one supply line for the supply of water in the Container and at least one line extraction to remove the Concentrate Container and in which the dialysis machine also has at least one Sensor to measure the concentrac Ion or to measure a parameter correlated with the same Concentrate withdrawn from the container,The dialysis machine is characterized in that at least one Control unit or regulation that is configured so that carries out the provision of a concentration of a dissolved substance Container according to one of claims 1 to 10.Un método de provisión de por lo menos un concentrado de por lo menos una sustancia disuelta para producir al menos una solución de diálisis, donde el método comprende los siguientes pasos: proveer al menos un recipiente que contiene al menos un sólido a ser disuelto, suministrar agua en el recipiente para disolver el sólido, drenar el concentrado de la sustancia disuelta del recipiente y ll
