Paraquat and diquat are widely used as agriculture herbicides to control crop and aquatic weeds. They ontaminat of drinking and environmental waters and are considered a risk factor for liver, heart, lung, and kidney illnesses. We review pertinent EPA methods for analysis that meet Maximum Contaminant Level Goal (MCLG) of 20 µg/L for diquat in drinking water and EU general rules for pesticides and herbicides in drinking water. We describe more recent work shows an improved method using a new mixed-mode column specifically designed to provide good peak shapes for diquat and paraquat.

The Thermo Scientific Dionex UltiMate 3000 HPLC system is applied for the analysis of ibuprofen and related substances. The separation was performed using a Thermo Scientific Acclaim Trinity P1 column, which is uniquely designed for pharmaceutical applications.

The Thermo Scientific Dionex Ultimate 3000 RSLC system is applied for the analysis of carnitine and its counter-ion tartrate in a nutritional supplement. The separation was performed on a Thermo Scientific Acclaim Trinity P1 column in under 8 minutes, with UV detection at 210nm.

The Thermo Scientific Dionex UltiMate 3000 RS system is applied for the analysis of acetylcarnitine and lipoic acid in nutritional supplements. The separation was performed on a Thermo Scientific Acclaim Trinity P1 column in under 8 minutes, with UV detection at 210 nm.

The Thermo Scientific Dionex Ultimate 3000 RSLC system is applied for the determination of cimetidine. The analysis was performed using a Thermo Scientific Acclaim Trinity P1 column with UV detection at 220 nm.