TABLE 1

Particle Size Diameter of Reported Colloids

Colloidal agent	Particle size (nm)	Percentage	Reference
Microaggregated albumin (nanocolloid)	<80	95	12
Rhenium sulfide	4–12	—	16
Sulfur colloid	100–300	—	16
	305–340	—	15
Lyocoll*	<200	74.4
	200–1,000	22.4	29
TCK-1^†	<200	58.2
	200–1,000	24.0
	1,000–3,000	7.8
	>3,000	10.0	29
0.1-μm filtered	10	—
	89–173	<0.1	15
	>200	56.8^‡
	30–200	7.3^‡
	<30	36.2^‡	12
Antimony trisulfide	38.1 ± 3.0	—	37
	3–15 or 10–25	—	18
	3–18	—	24
	∼9	—	38
	<30	—	25
	4–10	—	39

↵* Mallinckrodt Diagnostica, Petten, Holland.
↵† Oris-Industrie, Cedex, France.
↵‡ 48.3% were >0.2 μm, 5.4% were 0.2–0.03 μm, and 46.7% were <0.03 μm with old ^99mTc-pertechnetate milked; 83.2% were >0.2 μm, 2.2% were 0.2–0.3 μm, and 14.7% were <0.03 μm with prolonged heating and freshly milked ^99mTc-pertechnetate.