Reproducible PPM level detection of sulphur
WAS has developed an Inductive Coupled Plasma - Optical Emission Spectroscopy (ICP-OES) protocol.
The new protocol provides an affordable alternative to ICP-MS based methods for determining low ppm levels of sulphur in chemicals, pharmaceuticals, natural products, fuels, geological and nanoparticulate materials.
After trialling various sample weights - Warwick Analytical Service (WAS) scientists were able to determine a suitable measure to give the most accurate results.
WAS found that a larger volume of sample was more suitable but not so large that the microwave digestion process was incomplete.
The ICP conditions used for low level sulphur determinations typically requires a high purge for over an hour with the nebuliser and coil power set to axial view.