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. Since this increases the …

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 ] This technique is a …

2023年2月11日 · Depending on the information desired from mass spectrometry analysis, different ionization techniques may be desired. For example, a hard ionization method such as …

Mass spectrometrists have ever been searching for ionization methods softer than EI, because molecular weight determination is of key importance for structure elu-cidation. Chemical …

2006年9月15日 · Chemical ionization mass spectrometry (CIMS) is a technique for forming ions of the compound of interest (analyte, A) by ion/molecule reactions from reactant ions of a reagent …

2023年7月7日 · What is Chemical ionization? Chemical ionization is the technique of ionization in which the vaporized sample is inserted into the mass spectrometer accompanied by an excess …

The principle of chemical ionization is simple. The molecule to be studied is injected into the ionizing region of the mass spectrometer in the presence of \(0.5\)-\(1.5 \: \text{mm} \: \ce{Hg}\) …

In chemical ionization mass spectrometry (CIMS), ionization of the gaseous analyte occurs via gas-phase ion–molecule reactions rather than by direct electron impact (EI), photon impact or …

In chemical ionization mass spectrometry (CIMS), ionization of the gaseous analyte occurs via gas-phase ion–molecule reactions rather than by direct electron impact (EI), photon impact or …

Chemical Ionization. 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 …