atmospheric pressure chemical ionization
E902131
Atmospheric pressure chemical ionization is a soft ionization technique used in mass spectrometry to analyze relatively less volatile and thermally stable compounds under atmospheric pressure conditions.
All labels observed (1)
| Label | Occurrences |
|---|---|
| atmospheric pressure chemical ionization canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11073893 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: atmospheric pressure chemical ionization Context triple: [SCIEX, hasTechnology, atmospheric pressure chemical ionization]
-
A.
Atmospheric Chemistry Experiment
Atmospheric Chemistry Experiment is a Canadian satellite mission dedicated to measuring and studying the chemical composition of Earth's atmosphere, particularly ozone and related trace gases.
-
B.
Atmospheric Chemistry Experiment – Fourier Transform Spectrometer
The Atmospheric Chemistry Experiment – Fourier Transform Spectrometer is a satellite-borne instrument designed to measure and analyze the composition of Earth's atmosphere, particularly trace gases involved in ozone depletion and climate change.
-
C.
Fourier-transform ion cyclotron resonance mass spectrometry
Fourier-transform ion cyclotron resonance mass spectrometry is a high-resolution mass spectrometric technique that measures ion cyclotron frequencies in a strong magnetic field to determine the precise mass-to-charge ratios of ions.
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D.
Atmospheric Trace Molecule Spectroscopy experiment
The Atmospheric Trace Molecule Spectroscopy (ATMOS) experiment was a spaceborne instrument designed to measure and analyze trace gases in Earth’s atmosphere to study its composition, chemistry, and long-term changes.
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E.
ESCA (Electron Spectroscopy for Chemical Analysis)
ESCA (Electron Spectroscopy for Chemical Analysis) is a surface-sensitive analytical technique, also known as X-ray photoelectron spectroscopy (XPS), used to determine the elemental composition and chemical states of materials.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: atmospheric pressure chemical ionization Target entity description: Atmospheric pressure chemical ionization is a soft ionization technique used in mass spectrometry to analyze relatively less volatile and thermally stable compounds under atmospheric pressure conditions.
-
A.
Atmospheric Chemistry Experiment
Atmospheric Chemistry Experiment is a Canadian satellite mission dedicated to measuring and studying the chemical composition of Earth's atmosphere, particularly ozone and related trace gases.
-
B.
Atmospheric Chemistry Experiment – Fourier Transform Spectrometer
The Atmospheric Chemistry Experiment – Fourier Transform Spectrometer is a satellite-borne instrument designed to measure and analyze the composition of Earth's atmosphere, particularly trace gases involved in ozone depletion and climate change.
-
C.
Fourier-transform ion cyclotron resonance mass spectrometry
Fourier-transform ion cyclotron resonance mass spectrometry is a high-resolution mass spectrometric technique that measures ion cyclotron frequencies in a strong magnetic field to determine the precise mass-to-charge ratios of ions.
-
D.
Atmospheric Trace Molecule Spectroscopy experiment
The Atmospheric Trace Molecule Spectroscopy (ATMOS) experiment was a spaceborne instrument designed to measure and analyze trace gases in Earth’s atmosphere to study its composition, chemistry, and long-term changes.
-
E.
ESCA (Electron Spectroscopy for Chemical Analysis)
ESCA (Electron Spectroscopy for Chemical Analysis) is a surface-sensitive analytical technique, also known as X-ray photoelectron spectroscopy (XPS), used to determine the elemental composition and chemical states of materials.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
ionization technique
ⓘ
mass spectrometry ion source ⓘ soft ionization method ⓘ |
| abbreviation | APCI ⓘ |
| advantage |
good for moderately polar compounds
ⓘ
less susceptible to ion suppression than ESI for some analytes ⓘ tolerant to higher mobile phase flow rates ⓘ |
| analyzes |
less volatile compounds
ⓘ
thermally stable compounds ⓘ |
| canOperateIn | negative ion mode ⓘ |
| category | atmospheric pressure ionization technique ⓘ |
| commonlyCoupledWith |
LC–MS
NERFINISHED
ⓘ
high performance liquid chromatography ⓘ |
| commonlyUsedFor |
environmental analysis
ⓘ
metabolite profiling ⓘ pesticide analysis ⓘ pharmaceutical analysis ⓘ |
| contrastWith |
electron ionization
ⓘ
matrix-assisted laser desorption ionization ⓘ |
| developedFor | liquid chromatography–mass spectrometry ⓘ |
| environment | atmospheric pressure region outside mass spectrometer orifice ⓘ |
| ionizationMechanism |
charge transfer reactions
ⓘ
gas phase ion–molecule reactions ⓘ proton transfer reactions ⓘ |
| limitation |
less suitable for very nonvolatile analytes
ⓘ
less suitable for very thermally labile analytes ⓘ |
| operatesAt | atmospheric pressure ⓘ |
| produces |
[M+H]+ ions
ⓘ
[M−H]− ions ⓘ deprotonated molecules ⓘ protonated molecules ⓘ |
| reagentIonFormation | solvent ionization by corona discharge ⓘ |
| relatedTo |
atmospheric pressure photoionization
ⓘ
chemical ionization ⓘ electrospray ionization ⓘ |
| sampleIntroduction |
liquid effluent from LC
ⓘ
solution sprayed into heated region ⓘ |
| transferToMassAnalyzer |
sampling orifice
ⓘ
skimmer cone ⓘ |
| typicallyOperatesIn | positive ion mode GENERATED ⓘ |
| usedIn | mass spectrometry ⓘ |
| uses |
corona discharge needle
ⓘ
drying gas ⓘ heated nebulizer ⓘ nebulizing gas ⓘ reagent ions ⓘ |
| vaporizes |
analyte molecules
ⓘ
mobile phase ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: atmospheric pressure chemical ionization Description of subject: Atmospheric pressure chemical ionization is a soft ionization technique used in mass spectrometry to analyze relatively less volatile and thermally stable compounds under atmospheric pressure conditions.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.