Table 2. Comparison of the lower limits of detection (LLD) for Ca, Fe and Cu determined for the B16 beamline at Diamond Light Source and the P06 beamline at PETRA III as well as some of the measurement parameters.

For both beamlines a multi-element standard was scanned to determine the LLDs for various elements. The values for the PETRA III P06 beamline are taken from Boesenberg et al. (2016 ▸).

	Diamond B16	PETRA III P06
Ca K LLD (in ag for 1000 s)	92	2.241
Fe K LLD (in ag for 1000 s)	13	0.226
Cu K LLD (in ag for 1000 s)	7	0.109
Standard	NIST SRM 2783	AXO thin-film R11
Measurement time per pixel	120 s	20 ms
Excitation	12.7 keV	12 keV
Monochromator	Multilayer	Double-crystal monochromator
Spot size (vertical × horizontal)	500 nm × 600 nm	450 nm × 450 nm
Detector	SDD	Maia