Chlorine addition chemical ionization

Chlorine addition chemical ionization mass spectrometry A structurally unique molecule that is a member of a group of related compounds... 

In the work described here the utility of solvent adduct ions in TSP LC-MS which consist in the use of novel additives in the chromatographic eluent, such as ammonium formate or chloroacetonitrile, will be demonstrated for confirmation of structure of a variety of herbicides including triazines, phenylurea and chlorinated phenoxyacids. Complementary adduct ion information to the conventional TSP LC-MS mode of operation will be obtained. Because TSP LC-MS involves mainly a chemical ionization process where the vaporized eluent acts as chemical ionization gas, it will be of interest to compare the different adduct ions obtained here with those using other interfacing systems such as direct liquid introduction (DLI) (13-18). 

The straightforward detection and the identification of chlorinated bisbibenzyls of the bazzanin type were facilitated using laser desorption/ ionization time-of-flight mass spectrometry without the addition of chemical matrix. The degree of chlorination could be described by the eharacteristic isotope patterns excluding the artifacts doubt [143,144]. The use of this technique for the analysis of low molecular weight compounds is still quite rare because of possible matrix interferences. 

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