Milestones in fourier transform ion cyclotron resonance mass spectrometry technique development

Fourier transform mass spectrometry will play an important role in the future because of its unique combination of high mass resolution, high upper mass limit, and multichannel advantage. These features have already found application in gas chromatography-mass spectrometry, multiphoton ionization, laser desorption, and secondary ion mass spectrometry. However, its most notable feature is the ability to store ions. This characteristic, when combined with the others, will allow expeditious study of the interaction of gas-phase ions with both photons (photodissociation) and neutral molecules, and the convenient application of this fundamental information for chemical analysis.

https://science.sciencemag.org/content/sci/226/4672/261.full.pdf

Fourier Transform Mass Spectrometry

Concentrations of phosphate in natural waters are often below the detection limits of conventional nutrient autoanalyzers, by either gas-segmented continuous-flow analysis or flow injection analysis. A liquid waveguide capillary flow cell has been used to extend the sensitivity of a conventional autoanalyzer for the automated analysis of nanomolar concentrations of phosphate in natural waters. Total reflection of light can be achieved within the liquid core of the flow cell because the refractive index of a cell wall coated with Teflon 1600 is lower than that of water. This property allows the manufacturers to construct long liquid waveguide capillary flow cells in a helical, rather than a linear shape, with compact dimensions. A small sample volume is required because the internal volume of a 2-m long capillary flow cell is only approximately 0.5 cm3. Adaptation of this long flow cell to autoanalyzers significantly enhances the sensitivity of automated colorimetric analysis of phosphate with a molybdenum...

Automated Analysis of Nanomolar Concentrations of Phosphate in Natural Waters with Liquid Waveguide

Ben S. Freiser

Papers

Multiphoton ionization in Fourier transform mass spectrometry

Nature of the enol or secondary series of diphenylthiocarbazone chelates

Analytical applications of mixed ligand extraction equilibria Nickel-ditbizone-phenanthroline complex.