 |
Determination of Essential and Toxic Metals in Blood by ICP-MS Using Calibration in a Synthetic Matrix
Ryszard Gajek, Agilent Technologies
The use of internal standards (ISTDs) can compensate for matrix effects seen when using ICP-MS to accurately determine metals in complex matrices like blood by correcting the analyte response proportionally to measured changes in the ISTD response. Matching the ionic strength of the calibration standards with that of that blood samples (matrix matching), virtually eliminated the bias in the internal standard technique due to differences in ionization behavior of the ISTD in different matrices, resulting in accuracy and precision comparable to isotope dilution mass spectrometry (IDMS).
Read More |
Improving the Hermetic Seal on Windows
Richard Creighton, Moxtek
As a continuous improvement effort, Moxtek investigated the effects of plasma cleaning the metal mounts before attaching a window, and achieved around a 40% reduction in the diffusion of helium through the epoxy-to-mount interface.
Read More |
Boron Analysis in Glass Using Laser-Induced Breakdown Spectroscopy (LIBS)
Dr. Steve Buckley, TSI Incorporated
Boron is a light element that is easily measured using laser-induced breakdown spectroscopy (LIBS) but is difficult to measure using alternative technologies. In these tests, a LIBS system was used to conduct boron analysis in glass as well as Ulexite and Colemanite, which are boron containing ores used as feedstock in the glass industry.
Read More |
Single Particle Analysis Using the Agilent 7700x ICP-MS
Sebastien Sannac, Soheyl Tadjiki, and Evelin Moldenhauer, Agilent Technologies
The present work illustrates the suitability of the Agilent 7700x ICP-MS method to run single nanoparticle (NP) analysis. The method has been successfully applied to the analysis of gold and silver NPs with sizes from 15–60 nm. The single particle (SP)-ICP-MS method was able to deliver the size distribution, median size, number of particles, and the elemental concentration of a given NP sample.
Read More |
EDXRF App Note: Analysis of Gemstones
Scott Fess, Applied Rigaku Technologies
Rigaku application note #1241 describes the analysis of gemstones using low power EDXRF with indirect excitation. The method gives gemologists an excellent low background tool with low 50 W power, ensuring no damage to the gemstone during analysis.
Read More |
|
|
| |
 |
Determination of Low Concentration Methanol in Alcohol by an Affordable High Sensitivity Raman Instrument
Duyen Nguyen and Eric Wu, Enwave Optronics, Inc.
Low concentration natural methanol exists in most alcoholic beverages and usually causes no immediate health threat. Nevertheless, it is possible to have natural occurring methanol in beverages with concentration as high as 18 g/L of ethanol; or equivalent to 0.72% methanol in 40% ethanol, in alcohol (1). Current EU regulation limits naturally occurring methanol to below 10 g/L of ethanol; or equivalent to 0.4% methanol in 40% ethanol.
Read More |
Ultrasensitive 3D Confocal Raman Imaging
WITec GmbH
Confocal Raman microscopy is an excellent tool for true 3D chemical imaging. In this application note, the technique for ultrasensitive Raman imaging is highlighted along with various examples of applications.
Read More |
Choosing an OEM Spectrometer
Michael Allen, PhD, Ocean Optics
Choosing a spectrometer for OEM optical system development involves criteria such as making a product that can be reliably reproduced in volume, is scaleable over time, and meets regulatory requirements.
Read More |
Simplified Analysis of Lipid/Detergent Content in Biological Samples
Ivona Strug, Sara Gutierrez, Christopher Utzat, and Timothy Nadler, EMD Millipore
Analytical methods for lipid characterization involve multistep procedures, requiring sample manipulation/separation from biomolecules (proteins) before analysis. Direct Detect® spectrometer enables simultaneous protein quantitation and lipid analysis, in the same sample.
Read More |
|
|
| |
 |
DST-1000 Acid Purification System
Don Potter, Savillex
The Savillex DST-1000 Acid Purification system produces high purity acid from low cost trace metal grade acid. It can be used to purify HNO3, HCl, and HF. The DST-1000 can pay for itself in a short period of time through the cost savings by using trace metal grade acid instead of bottled high purity acid.
Read More |
|
|
|
