Analytical Laboratory Services - CoorsTek

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Analytical Laboratories Mechanical Testing & SEM + Chemical Analysis +1.303.277.4606 labs@coorstek.com Elemental Analysis Inductively Coupled Plasma–Optical Emission Spectroscopy ICP-OES is a versatile technique for elemental analysis of a wide variety of materials. Concentrations for most metals and some nonmetals can be determined at major, minor or trace levels using standard methods. Materials routinely analyzed include ceramics, glass, metals, alloys, aqueous solutions, pharmaceuticals and pottery glazes. The laboratory uses a Spectro-Arcos Inductively Coupled Plasma-Optical Emission Spectrometer. This instrument is capable of acquiring the entire UV-Visible spectrum from 130 to 770 nm. Typical Applications: • Ceramics (aluminas, zirconias, etc.) • Glass • Solders • Electroplating solutions • Organometallic compounds (such as magnesium stearate) • Pottery glazes (for heavy metal release) Inductively Coupled Plasma–Mass Spectrometry ICP-MS is a rapid, multi-element analytical technique capable of determining elemental and isotopic concentrations to sub ng/ml levels in solution. It combines two proven technologies: an inductively coupled plasma for ion generation and a quadrupole mass analyzer for the subsequent separation and detection of these ions. Up to 70 elements can be determined in every scan with this technique. The laboratory uses a Varian 820MS Inductively Coupled Plasma-Mass Spectrometer. The instrument has a Collision Reaction Interface for eliminating the typical interferences generated in the plasma. With the Cetac LSX-500 Laser Ablation sampling accessory, direct solid analysis is routine. The laser can vaporize a contaminated surface without affecting the underlying material of a solid sample. Sensitivities are generally to the µg/g level. Since there is no sample preparation, there is less opportunity for contamination. Typical Applications: • Isotope ratios • Aqueous Solutions • Metals • Solid surfaces/ contaminated areas • Ceramics • Glass • Micro-electronic devices 8
Analysis Case File Laser Ablation–ICP-MS of a Ceramic Material The Laser Ablation sampling accessory is a powerful tool for elemental analysis when used with the ICP-MS. For some solid samples a total dissolution is not practical because the distribution of the elements of concern may be inhomogeneous or because dissolution may introduce contamination. CoorsTek Analytical Laboratory applies the laser sampling technique when it is the most appropriate and when a fast, inexpensive qualitative survey is needed. A sample of ZrSnTiO 4 ceramic was submitted for analysis. The client requested a qualitative elemental analysis for trace contaminants. We studied the material by LA-ICP-MS and also by SEM/ EDS. The former identified 14 elements to be present in the sample while the latter identified only four. Since a standard material was not available, an accurate quantitative determination of the elements could not be made using these techniques. However, since the LA-ICP-MS technique found many more elements than the SEM/EDS technique, relative sensitivity became of interest. As a fi rst order approach to quantitative determination, the integrated spectral peak intensities were compared as though their concentrations were directly proportional to the elemental concentrations. In the following table the units are in percent of total detected peak intensity: From the table it is seen that the two techniques are in reasonable agreement regarding the concentrations of the major components, but the estimated detection limit of the SEM/ EDS is only about 1% whereas the LA-ICP- MS detected impurities down to the parts per million level. In addition to sensitivity, LA-ICP-MS has the advantages of: • Depth profi ling capability • No requirement for electrical conductivity in samples • Detection of Li, Be and B SEM/EDS has two advantages of its own: • The spatial resolution is superior • The analysis is non-destructive Comparison of Analysis Techniques LA-ICP-MS SEM/EDS Ti 48 42.6 Cu 0.0029 - Zn 0.86 1.3 Zr 40 43.7 Sn 9.2 12.4 Sb 0.00050 - Ba 0.0042 - La 1.4 - Ce 0.00019 - Nd 0.0013 - Hf 0.65 - Ta 0.0088 - Pb 0.0010 - Bi 0.0021 - Analytical Laboratories Mechanical Testing & SEM + Chemical Analysis +1.303.277.4606 labs@coorstek.com Additional Facilities The laboratories are equipped with additional instruments: • Leco oxygen and nitrogen analyzers • Leco carbon and sulfur analyzers 9
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Analytical Laboratory Services - CoorsTek

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