The vials were initially triaged; i.e. they were inspected and particles, if present, were located, photographed and measured in situ (Figure 1) without accessing the contents of the vials. Identified particles were grouped based on common optical features. Results of this initial investigation were reported to the client.
The client then reviewed the data and relevant vials were selected for further analysis. Particles were isolated and analysed by compound light microscopy, Fourier Transform Infrared (FT-IR) spectroscopy (Figure 2) and X-ray microanalysis (Figure 4).