公开(公告)号：US09677934B2

公开(公告)日：2017-06-13

申请号：US14470875

申请日：2014-08-27

Applicant: Thermo Electron Manufacturing Limited

Inventor： Stephen Hartwell ,  Nigel Cooper Bailey

IPC: G01J3/36 ,  G01J3/02 ,  G01J3/443 ,  G01J3/28

CPC classification number: G01J3/0297 ,  G01J3/28 ,  G01J3/443

Abstract: A method for deriving a background-corrected portion of a measured optical emission spectrum comprising the steps of identifying two or more background correction points from the portion of the measured emission spectrum; deriving a background correction function fitted to the identified background correction points, and applying the background correction function to the portion of the measured emission spectrum so as to produce a background-corrected portion of the emission spectrum, wherein the background correction points are identified from the measured data points by consideration of the gradients between the measured data points.