Abstract: Systems for feeding liquid into an analytical system. The liquid feed systems comprise a reservoir adapted to hold liquid for introduction into an analytical system, a liquid feed line adapted to deliver liquid from the reservoir to the analytical system, and an air feed system adapted to deliver pressurized air into the reservoir to cause liquid to flow from the reservoir into the liquid feed line. The air feed system has a dryer for removing humidity from air delivered to the reservoir. The dryer comprises a condenser assembly. The condenser assembly has a condenser block made of metal and having an extended, serpentine passageway therein. The passageway has an inlet and outlet allowing air to be passed therethrough and a drain allowing condensed moisture to flow therefrom. The condenser assembly also has a cooling element mounted to the surface of the condenser block for absorbing heat from the condenser block.

Abstract: Heat sinks for use in assemblies for preheating liquid samples prior to their introduction into an analytical stream. The heater assemblies have a heat sink having a metallic heater block and a heating element for heating the block. The block has a basin for receiving a liquid sample and allowing heat to be transmitted from the block to the sample. A drain at the lower end of the basin allows sample in the basin to flow out of the basin. A passageway extends through the block from the drain to an exterior surface of the block and provides a conduit for sample flowing from the drain, A temperature sensor is mounted in a cavity in the block and extends into the basin to measure the temperature of sample in the basin. A temperature sensor is mounted in a cavity in the block and measures the temperature of the block.