US 12,392,725 B2
Spark stand assembly for an optical emission spectroscopy instrument
André Peters, Kleve-Warbeyen (DE)
Assigned to HITACHI HIGH-TECH ANALYTICAL SCIENCE GMBH, Uedem (DE)
Filed by Hitachi High-Tech Analytical Science GmbH, Uedem (DE)
Filed on Jun. 28, 2023, as Appl. No. 18/343,461.
Claims priority of application No. 22182557 (EP), filed on Jul. 1, 2022.
Prior Publication US 2024/0003817 A1, Jan. 4, 2024
Int. Cl. G01N 21/73 (2006.01); G01J 3/443 (2006.01); G01N 21/67 (2006.01)
CPC G01N 21/73 (2013.01) [G01J 3/443 (2013.01); G01N 21/67 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A spark stand assembly for an optical emission spectroscopy, OES, instrument, the spark stand assembly comprising:
a spark stand body attached to a mounting flange that enables attaching the spark stand assembly to a main housing of the OES instrument;
an exciter disposed into a recess arranged on a top surface of the spark stand body;
an elevated portion arranged on the top surface of the spark stand body adjacent to the mounting flange;
an elongated notch arranged on the top surface of the spark stand body and connecting said recess to a passageway through the elevated portion;
a spark stand plate that is detachably attachable on the top surface of the spark stand body to cover said recess, said notch and at least part of the elevated portion such that said recess forms a plasma chamber and said notch forms a part of an optical transmission path from the plasma chamber to said passageway, wherein the spark stand plate comprises an opening therethrough for exposing a part of a sample positioned on the opening for excitation from the exciter, said opening positioned such that said opening is spatially aligned with the exciter when the spark stand d plate is attached on the top surface of the spark stand body, and
a sealing member arranged between the top surface of the spark stand body and the spark stand plate such that the sealing member encloses said recess and said notch and is routed over the elevated portion,
wherein the elongated notch connects said recess to an opening through the mounting flange via said passageway through the elevated portion and wherein the elongated notch has a depth that steadily decreases from a first end of the notch at said recess to a second end of the notch at the passageway through the elevated portion.