Open AccessA Physical Study to Explain Response Differences between the BID and FID Detectors for PAHs and Pesticides
Author(s) -
Amanda Fonseca Lopes,
Florêncio Gouveia,
Hélio Oliveira do Nascimento,
Vítor Paulo Andrade Silva,
Pablo G. A. Barbosa,
Técia Vieira Carvalho,
Ronaldo Ferreira do Nascimento
Publication year - 2022
Publication title -
journal of the brazilian chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.337
H-Index - 70
eISSN - 1678-4790
pISSN - 0103-5053
DOI - 10.21577/0103-5053.20220038
Subject(s) - detector , flame ionization detector , helium ionization detector , ionization , discharge ionization detector , chemistry , ionization energy , gas chromatography , signal (programming language) , pesticide , analytical chemistry (journal) , electron capture detector , atomic physics , environmental chemistry , ion , physics , chromatography , organic chemistry , optics , agronomy , programming language , computer science , biology
The dielectric barrier discharge ionization detector (BID) is one of the most modern detectors commercially available for gas chromatography (GC). Its technology based on the sample ionization through the energy released from the helium plasma generation process gives it the ability to act as a universal detector and a greater response to various types of compounds compared to the well-established flame ionization detector (FID). In this study, polycyclic aromatic hydrocarbons (PAHs), organophosphates (OPPs) and organochlorines pesticides (OCPs) were investigated. The parameters that could explain the performance of the BID and FID detectors were: structural factors, ionization energy (IE) and energy of the highest occupied molecular orbital (EHOMO), which were obtained by density functional theory (DFT). The relative (BID/FID) responses to PAHs and pesticides were about 1.8 and 3.0 times greater than FID, respectively. Less structural dependence of the BID signal compared to the FID signal was observed. Among the parameters calculated by DFT, the IE was the one that most seemed to have influenced the response of the two detectors studied. The theoretical data proved to be quite consistent to explain the trends observed experimentally, especially to the BID.