Automatic sampler and method for rinsing needle of the same
AssigneeShimadzu Corporation
InventorNobuyuki Tatsumi
Life of this patent
Estimating the term…
Abstract
An automatic sampler comprises a first rinsing bath for rinsing the needle by soaking the needle in a rinsing liquid, in which the rinsing liquid is reserved, and a second rinsing bath for rinsing the needle by soaking the needle in a rinsing liquid, in which the rinsing liquid is exchanged during the rinsing operation. The first rinsing bath and the second rinsing bath are selectively employed for the purpose of use. That is, when a high rinsing power is required, such as when cross contamination is prevented, the second rinsing bath having higher rinsing power is employed. On the other hand, when the throughput is emphasized, the first rinsing bath is employed to rinse the needle in a shorter time.
Claims4
An automatic sampler for injecting a sample into a sample introducing portion in communication to a column of a liquid chromatography, comprising:
- a) a needle for sucking the sample from a sample liquid bath and injecting the sample into the sample introducing portion;
- b) a first rinsing section for rinsing said needle by soaking said needle in a first rinsing liquid, in which the first rinsing liquid is not exchanged during the rinsing operation;
- and
- c) a second rinsing section for rinsing said needle by soaking said needle in a second rinsing liquid, in which the second rinsing liquid is exchanged during the rinsing operation,
- wherein said needle is rinsed by at least one rinsing section selected from said first rinsing section and said second rinsing section.
A method for rinsing a needle of an automatic sampler, said method comprising:
- rinsing the needle by at least one operation selected from a) rinsing the needle by soaking the needle in a first rinsing liquid, in which the first rinsing liquid is not exchanged during the rinsing operation, and b) rinsing the needle by soaking the needle in a second rinsing liquid, in which the second rinsing liquid is exchanged during the rinsing operation.
Dependencies are inferred from the claim text.