The ability to track & trace materials is a key feature in the entire chain, and it\nensures circularity principles. Examples from plastic recycling show the\nenormous added value that analytical technology can have for the circular\neconomy. During polymer production and recycling processes, pigments can\nbe added for different purposes; e.g. as colouring agent of the polymeric\nproduct but also as tracer for tracking process development and control in the\nfinal recycle products versus possible by-products. An analytical method for\ntracking the pigment Solvent Blue 15 in input materials, in intermediates as\nwell as in recyclates was developed by tracing and quantifying an indicator\nmetal which is copper (Cu). Therefore, suitable digestion procedures and a\nquantification method by high resolution inductively coupled plasma mass\nspectrometry................
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