Chemical ionization (CI) is a soft ionization technique used in mass spectrometry. [1][2] This was first introduced by Burnaby Munson and Frank H. Field in 1966. [3]

Chemical Ionization (CI) is a soft ionization technique that produces ions with little excess energy. As a result, less fragmentation is observed in the mass spectrum.

Chemical ionization (CI) is defined as a soft ionization technique that utilizes reagent ions to ionize volatile compounds through ion-molecule reactions, particularly in applications such as breath analysis.

Chemical ionization (CI) is the first of the soft ionization methods we are going to discuss. Historically, field ionization (FI, Chap. 8) has been applied some years earlier, and thus CI can be regarded as …

Jul 7, 2023 · In chemical ionization, the high-energy electron beam does not directly bombard the sample molecules in the vapor phase. Instead, a reagent gas such as methane, isobutane, …

Ionization, in chemistry and physics, any process by which electrically neutral atoms or molecules are converted to electrically charged atoms or molecules (ions) through gaining or losing electrons.

With chemical ionization, the ions produced have little excess energy which results in less fragmentation than electron ionization. With CI, the spectra generated show relatively little fragmentation, and an …

In chemical ionization, the sample is introduced to a chamber filled with excess reagent gas (such as methane). The reagent gas is ionized by electrons, forming a plasma with species such as CH 5+, …

Ionization or ionisation is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons, often in conjunction with other chemical changes. The resulting …

For organic chemists, Chemical Ionization (CI) is especially useful technique when no molecular ion is observed in EI mass spectrum, and also in the case of confirming the mass to charge ratio of the …