Herbicide and Metabolites by LCMS – AppNote

Glufosinate, N-Acetylglufosinate, and Glufosinate Propanoic Acid Analysis of these Compounds can be problematic with other methods and poor peak shape may occur. In contrast, the Peaks obtained in this method are very sharp and symmetrical and can be applied to food products containing these types of Compounds. Peaks: 1. Glufosinate m/z 180.0431 [M-H]– 2. N-Acetylglufosinate […]

Read More

Herbicides & Metabolite Analysis by LCMS- AppNote

Glufosinate, N-Acetylglufosinate, Glufosinate Propanoic Acid, Diquat  & Paraquat Two primary metabolites of Glufosinate are N-Acetylglufosinate and Glufosinate Propanoic Acid. Due to the potentially toxic nature of these Herbicides, analysis of their metabolites in a variety of sample matrices may be required. However, all three compounds are quite polar and therefore difficult to retain with conventional […]

Read More

Metaldehyde in Slug Pellets Analyzed by LCMS – AppNote

Pesticide Formulation As Metaldehyde is a non-UV absorbing compound, other detection methods needed to be investigated besides conventional UV-HPLC. LC-MS was found to be a well-suited analysis by searching for the EIC corresponding to the [M+H]+ ion. Good retention and peak shape were observed for this analyte using the Cogent Bidentate C18 2.o™ Column. Peak: […]

Read More

Tetrahydrocannabinol (THC) – AppNote

Psychoactive Component in Cannabis  Tetrahydrocannabinol has several isomeric forms, which may account for the extra peaks observed in the Chromatogram below. Although their identities could not be confirmed, these peaks can be separated from the main peak using the Cogent Bidentate C18  Column. The compound is quite hydrophobic and therefore a relatively high organic content […]

Read More

Zinc-EDTA Complex – AppNote

No Ion Pair Agents Needed Using conventional analytical methods, retention of metal–EDTA complexes is accomplished using Ion Pair Reversed Phase Chromatography. However, the Ion Pair Agents used in the Mobile Phase are not compatible with Mass Spectrometry. In this AppNote, only Formic Acid is needed in the Mobile Phase in order to obtain retention of […]

Read More