With the capability of generating large numbers of samples, sample tracking may become a serious issue. At present the location of the samples in the sets of 12 is indicated by cutting off one corner of the PET trays, marking the location of sample 1 in each set (Fig. ). This mark is maintained by the use of a small ceramic crucible during calcination and filling in one corner of the 3D printed PLA frame as shown in Fig. , and in more detail in Fig. . This avoids problems due to rotation of the sample sets and further tracking of the samples relies on careful manual record keeping, including photographing marked sample trays, which is adequate for our current diffraction limited rate of 4 trays of samples per day. High temperature capable barcodes/QR-codes are available (Lintec Europe, HP12 3SL, UK) that can be applied onto small ceramic plates, possibly made from alumina substrate for example as supplied by Almath Crucibles, (CB8 9NE, UK). These could be added to an extra well in the PET sample trays and transferred through the workflow along with the relevant sample set, allowing tracking of large numbers of samples.