A system and method uses a communication request andor historical data collected by one or more devices to identify whether to fulfill the request using ad hoc networking or access points. The teaching tool includes a modular robot that may be assembled in a plurality of configurations. The instrument comprises a needle pipe through which the solution sample is passed, a sheath tube formed coaxially with the needle pipe and passing a temperature-controlled nebulizing gas therethrough, the above-described desolvation block, means for cooling the block, means for heating the block, and a temperature sensor for detecting the temperature of the block.