公开(公告)号：US11965823B2

公开(公告)日：2024-04-23

申请号：US17629532

申请日：2020-05-29

Applicant: Foss Analytical A/S

Inventor： Per Waaben Hansen ,  Jeppe Sandvik Clausen

IPC: G01N21/27 ,  G01N21/3577 ,  G01N21/35 ,  G01N33/04

CPC classification number: G01N21/274 ,  G01N21/3577 ,  G01N2021/3595 ,  G01N33/04 ,  G01N2201/1214 ,  G01N2201/129

Abstract: A method of correcting for an amplitude change in a spectrometric instrument output includes: exposing a sample in a sample holder to electromagnetic radiation at a plurality of wavenumbers; detecting electromagnetic absorption intensities in the sample at the plurality of wavenumbers; providing to a computer device the detected electromagnetic absorption intensities indexed against wavenumber as spectral data; applying in the computer device a mathematical transform (Icorr) to the spectral data to correct for an amplitude change in the spectrometric instrument's output and calculated by determining a difference (Δ(SBZ)/) between first derivatives of a logarithmic transformation of spectral data (SBZ) from the zero material sample at two different wavenumber ranges (log10(SBZ(x1))/ and log10(SBZ(x2))/); and calculating the mathematical transform (Icorr) as a function inversely dependent on the determined difference (Δ(SBZ)/).

公开(公告)号：US12209907B2

公开(公告)日：2025-01-28

申请号：US17784870

申请日：2020-10-15

Applicant: Foss Analytical A/S

Inventor： Jeppe Sandvik Clausen

IPC: G01J3/427 ,  G01N21/03 ,  G01N21/27

Abstract: A method for determining an optical pathlength through a cuvette of a spectrophotometric apparatus includes obtaining a first single beam spectrum of a liquid zero-material at least in a first energy region in which the liquid zero-material absorbs at least a portion of incident optical radiation; obtaining a second single beam spectrum of a second liquid at least in the first energy region, the second liquid having a composition excluding the liquid zero-material and having no absorption of incident optical radiation in the first energy region; determining a dual beam spectrum of the liquid zero-material relative to the second liquid at least in the first energy region from the first and second single beam spectra; and calculating an optical pathlength through the cuvette based on processing spectral information obtained from the first energy region of the determined dual beam spectrum.