Method of dispensing microdoses of aqueous solutions of substances onto a carrier and a device for carrying out said method

A device for microdispensing a volume of an aqueous solution to a carrier, comprising:

• (a) a base having a side,
• (b) a plurality of rods, each rod having a base end and a free butt end, wherein the base ends of the rods are held firm against the side of the base and wherein the free butt ends of the rods are coplanar, and
• (c) means for maintaining the temperature of the free butt ends of the rods essentially equal to the dew point of the ambient air,
• wherein the means for maintaining the temperature of the free butt ends is a thermoelectric battery.

A method for microdispensing an aqueous solution to a carrier using a rodlike transferring element, comprising:

• (a) wetting a butt end surface of the transferring element with the aqueous solution of the substance,
• (b) forming on the butt end surface a preset dose of the solution, and
• (c) displacing the transferring element until the dose contacts a surface of the carrier and is transferred,
• wherein the temperature of the aqueous solution and the temperature-of the butt end surface of the transferring element are maintained at essentially equal to the dew point of the ambient air during dose formation and transference.