Method for injecting a sample being analyzed into the injection tube of a measurement cell, in particular of a densimeter

摘要

A method for injecting a sample being analyzed into the injection tube of a measurement cell which includes an injection opening and a punch. The sample is introduced into a syringe including a plunger, and the syringe is closed by an expendable cap having a male end closed by a strikable closure. The syringe is secured to the support of an injection station aligned with the injection opening, and a pusher displaces the syringe by vertical translation from an upper position to a lower position with the punch perforating the closure of the cap to inject the sample from the syringe into the injection tube.

主权项

1. A method for injecting a sample into the injection tube of a measurement cell, the injection tube including an injection opening and a punch, said method comprising the steps of:
introducing the sample into a syringe including a pump body having a. male end piece and a displaceable plunger; closing the syringe by a cap, the cap including a female end for receiving the end piece of the pump body and a male end closed by a strikable closure; after said closing step, securing the syringe substantially vertically, with the cap oriented downwardly, to a support provided on an injection device of the measurement cell, the injection device including an injection station aligned with the injection opening of the injection tube and further including a pusher for displacing the plunger of the syringe from an upper, positioning position to a lower, injection position; positioning the support in alignment with the injection station with the plunger facing the pusher and the cap facing the injection opening of the injection tube; after said positioning step, displacing the syringe to a lower syringe position, wherein the punch perforates the closure of the cap; and operating the pusher to displace the plunger of the syringe downwardly to inject the sample into the injection tube.