Abstract: A service processing method includes the steps of transmitting identification information of undesired processing nodes from a first node to a management node so that such information can be registered as nodes that the first node does not want to request for processing, and sending an inquiry from a second node to the management node in accordance with a request for service sent from the first node so that, before the second node requests another node for processing, the second node can check if the other node is one of the nodes that the first node has registered as the undesired nodes, and then transmitting a request for processing from the second node to the other node or still another node that is not registered as a result of the inquiry. It becomes possible for a user to avoid undesired node at user's end.

Abstract: A body fluid sample and a reagent are reacted in a reaction container, and after measuring the reaction solution the reaction solution is discharged from the reaction container. The vacant reaction container is washed by charging a detergent solution containing plural kinds of surface active agents through a nozzle of a washing mechanism. The detergent solution is a mixed solution containing polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene glycol ether, N-acyl amino acid salt and polyacrylic salt. By the washing method in accordance with the present invention, it is possible to eliminate bad effects due to incomplete washing of reaction containers in an apparatus for automatically successively analyzing biological samples.