. 2019 Aug 13;9(43):25094–25106. doi: 10.1039/c9ra01589b

The Fe₃O₄ amounts, specific surface areas (S_BET), drug loading amounts (DLA) and drug loading efficiencies (DLE) of the control HAp nanoparticles (S0) and hollow microspheres (S1) and the fabricated hollow magnetic HAp microspheres (S2–S4)⁷⁰.

Sample	Fe₃O₄ amount (wt%)	S _BET (m² g⁻¹)	DLA (mg g⁻¹)	DLE (%)
S0	—	11.17	19.08 ± 2.7	47.7 ± 6.75
S1	—	34.87	35.92 ± 0.12	89.8 ± 0.28
S2	3.97	41.55	30.24 ± 0.11	75.6 ± 0.28
S3	15.38	52.32	30.16 ± 0.59	75.4 ± 1.41
S4	40.78	67.26	28.86 ± 1.95	72.2 ± 4.88

The Fe3O4 amounts, specific surface areas (SBET), drug loading amounts (DLA) and drug loading efficiencies (DLE) of the control HAp nanoparticles (S0) and hollow microspheres (S1) and the fabricated hollow magnetic HAp microspheres (S2–S4)70.