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. 2018 Dec 6;8(71):40912–40920. doi: 10.1039/c8ra08216b

Summary of the constraints for the 4 techniques.

XRD XRF FTIR Raman
Penetration depth 1 mm 3 mm μ Scale μ Scale
Spot size 8 × 8 mm 1 mm diameter 3 mm diameter μ Scale
Plate size and dimension Optimized template No constraint Optic alignment No constraint