Grease analysis poses some unique challenges. Sample size is often very small yet contamination levels and particle sizes involved are often anything but! The most challenging bit is getting the sample dilute enough to pass through the fine capillaries of an ICP without clogging them up and damaging the instrument. And that’s before you start looking at the size of the debris? How do we manage? By not using an ICP! We use a Rotating Disk Electrode spectrometer instead. Problem solved.