Patent ID: 8474337

Claim:
An extraction vessel for containing an extraction solution and extracting a sample, collected by a collection section of a sampling rod comprising a rod body and the collection section attached to the rod body, from the collection section into the extraction solution, the vessel comprising: a vessel body for containing an extraction solution and a valve expansion member, wherein the vessel body is provided with a body opening and a valve disposed in an insertion path of the sampling rod to be inserted from the body opening, the valve being provided with a valve opening having a diameter smaller than a diameter of the collection section and being capable of receiving the rod body, and wherein the valve expansion member comprises a member structured to be inserted into the body opening and fitted to the vessel body, and provided with a member opening, which comprises a through aperture that allows the sampling rod to be inserted into the vessel body when the member is fitted to the vessel body, and a valve expansion section that expands the valve opening when the member is fitted to the vessel body.