 |
EDXRF Application Note #1343: Electric Arc Furnace Slag
Applied Rigaku Technologies
Rigaku EDXRF application note #1343 demonstrates the analysis of major oxides of iron, calcium, and silicon in electric arc furnace slag (EAFS) for screening purposes, furnace control, and slag quality control. Performance for other oxides is also summarized. The results of this study indicate that the Rigaku NEX QC+ EDXRF analyzer can achieve excellent results screening and monitoring the concentration of FeO, CaO, and SiO2 in electric arc furnace slag and other similar matrices.
Read More |
Quantitative EDXRF Analysis of Elements in a Small Quantity of Organic Matter
Shimadzu
When a sample is of indeterminate form or the quantity is small, obtaining stable quantitative values can be problematic due to fluctuation of the X-ray fluorescence intensity. This application note presents a new feature of the background FP (BG-FP) method that effectively provides stable quantitative values in analysis of such samples.
Read More |
Handheld LIBS Analysis for Aluminum Alloys
Don Sackett, PhD, SciAps
Handheld laser induced breakdown spectroscopy (LIBS) offers an alternative technique to both handheld XRF and spark OES for the analysis of a broad range of elements and sample types. It delivers the low atomic number performance of mobile OES with the portability and performance on transition and heavy metals of handheld XRF. The benefits and advantages of handheld LIBS for on-site analysis of lithium and other critical elements in aluminum alloys are described here.
Read More |
Determination of Major and Minor Elements in Geological Samples Using the 4200 Microwave Plasma-Atomic Emission Spectrometer (MP-AES)
Terrance Hettipathirana and Phil Lowenstern, Agilent Technologies
This application note presents the base metals (Ag, Cu, Ni, Pb, and Zn) results for geochemical certified reference materials analyzed by the 4200 MP-AES. With the introduction of the 4200 MP-AES, the application range of the MP-AES has expanded to include challenging geochemical samples. Featuring an advanced microwave cavity and a torch designed to handle sample with high dissolved solids with better detection limits, the 4200 MP-AES has an increased working range from percent to sub-ppm levels and allows safe, unattended analysis even in remote locations.
Read More |
Pharmaceutical Ingredient Uniformity Determination Using LIBS
Steve Buckley, PhD, TSI, Inc.
The uniform blending of active pharmaceutical ingredients (API) and excipients is critical to product quality. The homogeneity of ingredients within a batch or tablet must often be rapidly determined with minimal sample modification. In this experiment, LIBS analysis was used to rapidly monitor batch powder and tablet homogeneity.
Read More |
|
|
| |
 |
Aggressive Aqueous Solution Study Using ATR
Clive Moss, Specac Ltd.
Aggressive liquid samples (solutions or solvents) that are acidic by nature can be analyzed by IR liquid transmission cells. To comply with certain Pharmacopeia regulations, chemicals and samples are required to have infrared spectral data collected for them between the frequency range of 4000 cm-1 to 400 cm-1 (2.5–25 µm wavelength).
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 |
Generating Purge Gas for FT-IR Spectroscopy
Kim Myers, Parker Balston
Fourier transform infrared (FT-IR) spectrometers provide spectra in less time than scanning systems, but water vapor or CO2 in the sample chamber leads to additional peaks that may obscure important information. These interferences can be eliminated by sealing the sample chamber and purging with dry, CO2-free air (purge gas) or nitrogen for a short period of time.
Read More |
Improving Absorption Measurements through Light Source Selection
Yvette Mattley, PhD, Ocean Optics
Stray light limits the maximum absorbance level achievable with a given spectrometer. Once the stray light limit is reached, sample dilution or a smaller pathlength is required to measure more concentrated samples. In this application note, we show the impact of stray light on the maximum absorbance level and describe how optimizing the choice of light source can minimize stray light and increase the maximum absorbance measured.
Read More |
|
 |
The Art of Milling
Dr. Andreas Theisen, Retsch
The following situation is typical for many production plants: After a routine quality check, the production process is stopped or an already produced batch is suspended because the analysis results were not within the relevant critical values. But does the tested product really deviate from the specifications? The quality control managers are convinced of this because modern analysis instruments provide results with very low tolerances. The sample in question was tested several times and the result was confirmed. The question is why the product does not match the specifications although the production parameters have not been changed in any way.
Read More |
|
|
|
