High-performance size exclusion chromatography with multiple

High-performance size exclusion chromatography (HPSEC) techniques with multiple online detectors (e.g., UV-, fluorescence-, or element-specific systems, Figure 10.6) enables a better understanding of quantitative and qualitative DOM properties... 

High-Performance Size Exclusion Chromatography combined with Multiple Angle laser Light Scattering detection... 

Although several different mass spectrometric methods have been deployed to determine enriched stable isotopes in human studies of nutrient mineral metabolism, thermal ionization mass spectrometry (TIMS) and particularly ICP-MS are now used almost exclusively. ICP-MS is rapid, very sensitive, and sample preparation and introduction is often simplified. Furthermore, ICP-MS can be coupled directly to separation techniques such as size-exclusion chromatography (SEC), high-performance liquid chromatography (HPLC), or CE so that speciation, the determination of the chemical form of particular elements, may also be studied. The two major drawbacks of ICP-MS, low precision relative to TIMS and interference from polyatomic ions in the argon plasma, have largely been overcome by new generations of instruments equipped with multiple collectors and collision/reaction cells, respectively. 

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