ČSN EN 17173 (by DeepL) - Evropský slovník CBRNE

3.133 confirmed identification, chemical agents

identification confidence level criteria for analysis samples suspected containing chemical agents

Note 1 to entry: Identification of a chemical agent is confirmed when one of the following criteria has been met:

— A complete spectrum acquired using a single spectrometric technique matches the corresponding reference spectra in a database. If the molecular ion is not present in the mass spectrum, techniques such as chemical ionization is performed to confirm the molecular mass of the compound.

— The chromatographic retention data acquired for the chemical agent during mass spectrometric analysis using selected ion monitoring (minimum of three ions) matches that of an authentic reference standard. The ratio of the three ions falls within 10 % of the values of an authentic reference standard run under identical experimental conditions in consecutive analyses. The ions should have coincident maxima, the same peak width at half height and exhibit a signal to noise ratio greater than three.

Note 2 to entry: See: Provisional identification, unambiguous identification.