Method of making a capillary channel

Details Method of making a capillary channel Method of making a capillary channel

G - Physics

01

N

G01N 21/77 (2006.01) G01N 27/403 (2006.01)

Patent

CA 2697026

An optical reagent format with a precise capillary chan-nel is made by molding a format on a carrier of a precise pre-determined thickness. The carrier includes an insert at least a portion of which is molded in the format. Once the format is made, the insert is detached from the carrier and removed from the format leaving a precisely dimensioned capillary channel with an inlet and vent. A reagent may be applied in the capillary channel and the format used to measure the ana-lyte in a fluid such as blood. An electrochemical sensor with a capillary channel is formed by placing a sacrificial insert and electrodes on a sensor base and applying plastic material. After the plastic material is cured, the sacrificial is removed leaving a capil-lary channel in the sensor. The inserts may be removed by a tool including a clamp for clamping and holding each insert stationary and a sliding block to which the sensor is secured.

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