Introduction The U.S. Geological Survey (USGS) has been producing reference materials since the 1950s [1]. Over 50 materials have been developed to cover bulk rock, sediment, and soils for the geological community. These materials are used globally in geochemistry, environmental, and analytical laboratories that perform bulk chemistry and/or microanalysis for instrument calibration and quality ...

In this study, tablets coming from different police seizures (in Switzerland) were analysed by ICP/MS and ICP/AES. Two methods of preparation were carried out in order to compare the influence of sample preparation. 25 elements were screened by ICP/AES whereas most of the periodic table could be screened by ICP/MS. Approximative detection limits were determined for most of the elements showing,...

Introduction: Recent progress in susceptibility reconstruction from single or multiple phase images [1,2,3] has led to a better characterisation of this novel contrast in the brain. A surprisingly large anisotropy of the reconstructed susceptibility of white matter has been observed and is being discussed [4,5,6]. However, neither the source of anisotropy nor that of susceptibility contrast are...

LC-MS/MS is widely used in every stage of drug development, from discovery and characterization through manufacturing and quality control of the final pharmaceutical product. Due to its excellent selectivity for complex molecules, LC-MS/MS is an effective tool for both non-target qualitative analysis and quantitative analysis of targeted compounds. However, the sensitivity of LC-MS/MS varies si...

In order to determine low levels of Cd in urine samples, we tried to remove Mo interference using ICP-MS with a dynamic reaction-cell technique, but failed due to the low sensitivity and the variance with the standards. We then performed solid-phase extraction (SPE) before the ICP-MS measurement. A commercially available chelating resin, NOBIAS PA-1, was used for SPE, and could effectively remo...

A new method is described for the analysis of copper (Cu) containing ceruloplasmin (Cp) in human serum. The method uses immunoaffinity plus size-exclusion chromatography (SEC) to separate Cp from other proteins and from inorganic ions, with inductively coupled plasma mass spectrometry (ICP-MS) detection of 63Cu and 65Cu to identify the protein. A reference serum certified for Cp was used to est...

The simultaneous determination of As(III), As(V), and DMA has been performed by ion chromatography (IC) coupled with inductively coupled plasma-mass spectrometry (ICP-MS). The separation of the three arsenic species was achieved by an anionic separator column (AS 7) with an isocratic elution system. The separated species were directly detected by ICP-MS as an element-selective detection method....