Patent ID: 9649634
Date: 2017-05-16
CPC Classifications: B01L,G01N

Claim:
1. An interconnection mechanism for a column and a needle, comprising: a) a needle having an internal passage through which a liquid is to be passed, a rear end to which a tube for supplying the liquid is to be connected, and a tapered portion of which a diameter gradually decreases toward a tip; b) a column inside which a port-inside passage is formed at a lower end for allowing the liquid to pass through; c) a column rack having a column holder for holding the column in an upright position while allowing an upward shift of the column and an opening provided below the column holder; and d) a moving system for inserting the needle into the port-inside passage at the lower end of the column through the opening by changing a vertical position of the needle or the column rack by a predetermined distance, with the needle positioned directly below the opening and the tip of the needle directed upward, wherein: the port-inside passage includes a tapered passage section having a conical shape of which a diameter gradually decrease towards upward, and a straight passage section having a cylindrical shape which extends from an upper end of the tapered passage section, wherein a smallest outer diameter of the needle is smaller than an inner diameter of the straight passage section, and a largest outer diameter of the needle is larger than the inner diameter of the straight passage section.