Application Notes

This application note describes the determination of the triphenylmethane dyes Malachite Green and Crystal Violet and their metabolites from the aquaculture samples brown trout, shrimp, and tuna using dispersive SPE (dSPE) with CHROMABOND QuEChERS mixes for sample clean-up.

Demonstratation of the glycopeptide enrichment efficiency of iSPE®-HILIC material for glycoproteomics applications using a well characterized glycoprotein standard.

This application note details an optimized method for the extraction and cleanup of pesticide residues from coffee using a QuEChERS extraction procedure followed by a silica gel SPE cleanup.

In this study, AF4-MALS-ICP-MS was applied to characterize four commercial tattoo inks: outlining black, purple deep violet, green grasshopper, and blue ice.

In this study, we developed a simple dilute-and‑shoot method that provides a fast 3.5-min analysis of fentanyl and related compounds (norfentanyl, acetyl fentanyl, alfentanil, butyryl fentanyl, carfentanil, remifentanil, and sufentanil) in human urine by LC–MS/MS using a Raptor Biphenyl column.

Sphingolipids are major components forming biological membranes, and they serve as intracellular signalling molecules. It is important to measure the amount of these molecules in biological samples because they have a massive influence on various metabolic diseases such as obesity, diabetes, and Alzheimer’s disease. Recently, an improved method using a YMC-Triart C18 metal-free column was reported by Dr. Gowda et al.

In this application note, two commercially available samples were analyzed in the ASTRA® software by SEC coupled to a multi-angle light scattering (MALS) detector (DAWN®), a refractive index detector (Optilab®), and a differential viscosity detector (ViscoStar®).

• Tips for mobile phase filtration • Answers to FAQs about syringe filter selection • Why filtration is so important to method development and sample prep • Filters for sample prep in dissolution testing

• Modern software makes tracking and scheduling maintenance more efficient • Systems schedule maintenance based on instrument usage

Solutions to address these challenges in the biopharmaceutical development process N-glycan screening for clone selection, characterization and process control

Aroma compounds in scented wax candles as well as aroma and odor emissions were determined by GC/MS after direct thermal extraction and air sampling with sorbent tubes.

Data acquired using the Centri® automated multi-mode sampling and preconcentration system for GC–MS can be used to generate insights into the aroma profiles of foods.

Using a PFAS delay column is an effective way to separate target PFAS in samples from interferences caused by PFAS contamination in the LC system.

Shodex HILICpak VT-50 is suitable for the analysis of phosphorous-containing amino acids herbicids including glyphosate, glufosinate and their metabolites using ESI-MS detection.

Antibody molecular weight analysis can now be easily performed on the Shodex PROTEIN LW-803.

Shodex RSpak DE-413L is suitable for the analysis of water-soluble vitamins in a single run.