Table 3. Overview on ¹⁶³Ho samples with their respective mass and composition.

batch number	m(163Ho) [mg]1	A(163Ho) [MBq]	m(165Ho) [mg]1	163/165Ho at. ratio1	A(166mHo) [kBq]2	163/166mHo at. ratio1,2
I	0.25(1)3	4.4	0.14(1)	1.83	6.3(1)	2.9x103
II	1.28(3)4	22.7	0.84(2)	1.52	37.7(3)	2.4x103
III	6*	100*	4*	1.5*	200*	2x103*

¹ –measured by ICP-MS

² –measured by γ‑spectrometry

³ –impurity content: {161,162,164,166,167,168,169,170}/163 < 0.0005

⁴ –impurity content: 162/163–0.00125; 164/163–0.0025; 166/163–0.0011; 168/163–0.0006

*—estimated numbers calculated using the ChainSolver program