. Author manuscript; available in PMC: 2011 Jan 1.

Published in final edited form as: J Anal At Spectrom. 2010;25(3):260–268. doi: 10.1039/b921770c

Table 2.

Particle size, size distribution, and the variation of Tm and Eu content for some PS-PAA beads synthesized in the presence of LnCl₃.6H₂O.

Sample	d ± σ_d^a (μm)	CV_d%^a	Ln loading^b	Ln measured^c	CV_Ln%^d
AA070-Tm	2.1 ± 0.052	1.8	1.00	8.0 × 10⁷	25
AA086-Tm	1.9 ± 0.066	1.9	0.10	1.1 × 10⁷	37
AA120-Eu^e	2.2 ± 0.035	1.4	0.10	1.2 × 10⁷	14

d = mean diameter; σ_d = one standard deviation; CV_d = coefficient of variation of the diameter.

Ln loading: wt %/styrene of LnCl₃.6H₂O based upon styrene used in the particle synthesis, see Table 1.

The number of Tm and Eu atoms per bead from the mass cytometry intensity and calculated by Equation 2.

CV of ¹⁶⁹Tm and ¹⁵³Eu intensity measured by mass cytometry.

Synthesized by 3-stage dispersion polymerization.