Ammonium hydroxide (NH4OH) is a chemical used in the manufacture of semiconductor devices, and must therefore be analyzed for trace metal impurities. The direct analysis of undiluted (20%) NH4OH using ICP-MS is challenging because its high vapor pressure causes plasma instability. However, dilution of the samples would degrade detection limits, so the ability to directly analyze 20% NH4OH is im...

An initial study of the minor element, trace element, and impurities in Corning archeological references glasses have been performed using three microbeam techniques: electron probe microanalysis (EPMA), laser ablation ICP-mass spectrometry (LA ICP-MS), and secondary ion mass spectrometry (SIMS). The EPMA results suggest a significant level of heterogeneity for a number of metals. Conversely, h...

Sodium peroxide (Na2O2) fusion coupled to Inductively Coupled Plasma Tandem Mass Spectrometry (ICP-MS/MS) measurements was used to rapidly screen quartz-rich geological samples for rare earth element (REE) content. The method accuracy was checked with a geological reference material and Instrumental Neutron Activation Analysis (INAA) measurements. The used mass-mode combinations presented accur...

A methodology based on coupling isocratic high-performance liquid chromatography (HPLC) and inductively coupled plasma mass spectrometry (ICP-MS) with optimized collision/reaction cell conditions has been developed for the simultaneous analysis of organic and inorganic selenium species in natural water samples. Selenium concentrations found in total and speciation analysis of a number of water ...

This work describes a procedure for the determination of copper, selenium, and zinc in serum using the Agilent 7500ce collision/reaction cell (CRC) ICP-MS in both helium and hydrogen modes. The method utilizes the high-accuracy technique of isotope dilution whereby the sample is spiked with an isotopically enriched solution to an optimum ratio and measured alongside a spiked calibration standar...

OBJECTIVE To investigate a novel method, namely using bilateral internal iliac artery ligation combined with a high-fat diet (BCH), for establishing a rat model of erectile dysfunction (ED) that, compared to classical approaches, more closely mimics the chronic pathophysiology of human ED after acute ischemic insult. MATERIALS AND METHODS Forty 4-month-old male Sprague Dawley rats were random...

Provenance determination of archaeological remains is a valuable tool for reconstruction past exchange networks. Among these materials, oyster shells are ubiquitous in sites from all prehistorical and historical periods. Thus, they seem to be promising candidates provenance identification as include chemical elements the environment their shells, which implies that an elemental fingerprint regi...

1. General Experimental Details 2. Oxidative Addition Complexes and Synthetic Procedures 3. Peptide Synthesis and LC-MS Characterisation 4. Macrocyclisation Reactions and LC-MS Characterisation 5. C-CA Protein Expression 6. BioLayer Interferometry Binding 7. Lipophilicity, Phospholipid Affinity, Volume of Distribution, and Human Serum Albumin Binding Data 8. ICP-MS Analysis 9. References 10. NM...