Seat device for releasably retaining sample hypodermic needle of sample injection device utilized to inject fluid sample into fluidic path of measuring device for testing sample, has capillary tube in fluid communication with fluidic path

摘要

#CMT# #/CMT# The device (300) has a capillary tube (304) partially arranged on a housing (302). An end section (306) of the capillary tube forms a needle seat for a sample hypodermic needle (202), where the capillary tube is in fluid communication with a fluidic path. The end section is conically extended in relation to a hollow cylindrical portion (314) of the capillary tube. Wall thickness of the capillary tube in the end section is smaller than that of the capillary tube beyond the end section. An outer small tube (310) surrounds an inner small tube (308) with mechanical stress. #CMT# : #/CMT# The outer small tube is made of material that is selected from a group consisting of metal, stainless steel, ceramic and high-strength plastic. Independent claims are also included for the following: (1) a sample injection device (2) a measuring device for testing a fluid sample (3) a method for manufacturing a seat device (4) a method for injecting a fluid sample into a fluidic path. #CMT#USE : #/CMT# Seat device for releasably retaining a sample hypodermic needle of a sample injection device utilized for injecting a fluid sample into a fluidic path of a measuring device for testing the fluid sample (all claimed) in a HPLC field. #CMT#ADVANTAGE : #/CMT# The capillary tube is in fluid communication with the fluidic path of the measuring device, so that fluid sample loading into the measuring device can be enabled without leakage at a needle seat connection. The end section of the capillary tube is conically extended in relation to the adjacent portion of the capillary tube, thus completely avoiding undesired sample delay and undesired dead volume caused due to an interface between fluidic components. The outer small tube surrounds the inner small tube with the mechanical stress, so that overall stability of the seat device can be enhanced. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a sectional view of a seat device with a sample hypodermic needle. 202 : Sample hypodermic needle 300 : Seat device 302 : Housing 304 : Capillary tube 306 : End section of capillary tube 308 : Inner small tube 310 : Outer small tube 314 : Hollow cylindrical portion #CMT#POLYMERS : #/CMT# The inner small tube consists of a plastic material such as polyetheretherketone (PEEK)(RTM: High performance engineered polymer).