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# CITATION.cff file created with {cffr} R package
# See also: https://docs.ropensci.org/cffr/
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cff-version: 1.2.0
message: 'To cite package "appac" in publications use:'
type: software
license: GPL-3.0-only
title: 'appac: Atmospheric Pressure Peak Area Correction for Gas Chromatography with
  Standard Detectors'
version: 4.0.3
doi: 10.1016/S0021-9673(00)99223-9
abstract: Corrects gas-chromatography peak areas for the influence of ambient air
  pressure on standard detectors open to the ambient atmosphere, such as the flame
  ionization detector, whose pressure sensitivity was characterised by Bocek, Novak
  and Janak (1969) <https://doi.org/10.1016/S0021-9673(00)99223-9>. Unlike the pressure
  compensation of Ayers and Clardy (1985) <https://patents.google.com/patent/US4512181A>,
  which is combined with a calibration and valid only for a single calibration period
  of a few days, per-cylinder peak areas are decomposed by principal components into
  a pressure-correlated component and per-peak drift; a common pressure-sensitivity
  coefficient (kappa) is estimated with a heavy-tail-robust fit on a drift-reduced
  signal, and slow drift plus a daily factor are removed. Returns the corrected areas
  together with a chi-square goodness-of-fit diagnostic. Structural-break detection
  (package 'strucchange', Zeileis and others (2002) <https://doi.org/10.18637/jss.v007.i02>)
  is provided for episode-level and variance breakpoint analysis.
authors:
- family-names: Forster
  given-names: Ruediger
  email: meticulous.measurements@gmail.com
  orcid: https://orcid.org/0009-0006-4851-7430
preferred-citation:
  type: article
  title: Effect of pressure on the performance of the flame ionization detector
  authors:
  - family-names: Boček
    given-names: P.
  - family-names: Novák
    given-names: J.
  - family-names: Janák
    given-names: J.
  journal: Journal of Chromatography A
  year: '1969'
  volume: '43'
  doi: 10.1016/S0021-9673(00)99223-9
  start: '431'
  end: '436'
repository: https://cran.r-universe.dev
commit: 546b3d4f3b7cb6bde362fd9f1b223baa1d5d0d4f
date-released: '2026-07-15'
contact:
- family-names: Forster
  given-names: Ruediger
  email: meticulous.measurements@gmail.com
  orcid: https://orcid.org/0009-0006-4851-7430
references:
- type: generic
  title: Pressure Compensation for a Chromatograph
  authors:
  - family-names: Ayers
    given-names: B. O.
  - family-names: Clardy
    given-names: E. K.
  year: '1985'
  notes: US Patent 4,512,181
  url: https://patents.google.com/patent/US4512181A
- type: report
  title: The importance of area and retention time precision in gas chromatography
  authors:
  - name: Agilent Technologies
  institution:
    name: Agilent Technologies
  issue: 5989-3425EN
  year: '2005'
  url: https://www.agilent.com/cs/library/technicaloverviews/public/5989-3425EN.pdf