Finnigan Mat Gmbh

Russell H Robins

A probe adapter for converting a thermospray equipped LC/MS analyzer to an electrospray equipped LC/MS analyzer. The probe adapter includes structure defining an elongated and hollow first chamber opened at one end to atmosphere and closed at the other end by a first partition. Additional structure is provided defining a hole through the first partition and an elongated and hollow probe shaft is connected to and extends from the first partition on a side thereof remote from the opened end. A central axis of the probe shaft is coaxial with a central axis of the first hole. A second partition is provided in the first chamber and is spaced from the first partition and defines a second chamber therebetween. Adjusting structure is provided for selectively adjusting the spacing between the two partitions. A second hole is provided in the second partition and is coaxially aligned with the first hole. An elongated and hollow drift tube is mounted inside the probe shaft, an inlet end of the drift tube extending through the first hole in the first partition and terminating in the second chamber. An outlet end of the drift tube extends a finite distance beyond an end of the probe shaft remote from the first partition. The relative spacing between the first and second partitions determines a spacing between the inlet end of the drift tube and the second hole.

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Kalamazoo, MI, United States of America

Russell H Robins