Gas-phase ion mobility of protonated aldehydes in helium measured using a selected ion flow-drift tube

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F24%3A00585947" target="_blank" >RIV/61388955:_____/24:00585947 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/24:10484606

Result on the web

<a href="https://hdl.handle.net/11104/0353581" target="_blank" >https://hdl.handle.net/11104/0353581</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/rcm.9767" target="_blank" >10.1002/rcm.9767</a>

Result language

angličtina

Original language name

Gas-phase ion mobility of protonated aldehydes in helium measured using a selected ion flow-drift tube

Original language description

RationalenIn soft chemical ionization mass spectrometry, analyte ions are produced via ion–molecule reactions in the reactor. When an electric field E is imposed, the ion drift velocity vd determines the reaction time and the effective ion temperature. Agreement between experimental ion mobilities and theoretical predictions confirms the accuracy of the ion residence time measurement procedure.nMethodsnA selected ion flow-drift tube (SIFDT), an instrument with a chemical ionization source, was used to produce protonated aldehydes and selectively inject them into the resistive glass drift tube filled with He. Arrival-time distributions of ions were obtained using the Hadamard modulation. Reduced ion mobilities were then obtained at a pressure of 2 hPa in the E/N range of 5–15 Td. Theoretical ion mobility values were calculated using two methods: hard-sphere approximation and trajectory modelling.nResultsnThe measured mobilities of three saturated and three unsaturated protonated aldehydes do not show substantial variation across the studied E/N range. Effective temperatures calculated using the Wannier formula from measured gas temperatures ranged from 300 to 315 K. Experimentally obtained values of the near-zero- E/N-reduced ion mobilities agree with both methods of calculations typically within ±3% standard deviation (maximum ±5%).nConclusionsnThe experimental SIFDT values of reduced mobilities in He of protonated aldehyde molecules generated from a chemical ionization source are in close agreement with two different theoretical methods based on the density functional theory calculations of ion geometries and partial atomic charges. Besides its fundamental importance, the ion mobility results validate the correct operation of the drift tube reactor and the ion residence time measurement procedure. Diffusion losses can also be determined from these results.n

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

<a href="/en/project/GA21-25486S" target="_blank" >GA21-25486S: Selected ion flow drift tube mass spectrometry with negative ions and nitrogen carrier gas</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Rapid Communications in Mass Spectrometry

ISSN

0951-4198

e-ISSN

1097-0231

Volume of the periodical

38

Issue of the periodical within the volume

14

Country of publishing house

US - UNITED STATES

Number of pages

11

Pages from-to

e9767

UT code for WoS article

001222524600001

EID of the result in the Scopus database

2-s2.0-85193056051