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. 2020 Aug 14;130(3):280–285. doi: 10.1177/0003489420949588

Table 1.

Impactor Results from Trials Using Different Fluorescent Tracers.

	Particle Size (µm) - D₅₀ at 15 L/min
Tracer	14.1	8.61	5.39	3.30	2.08	1.36	0.98	<0.98
Saline^*	⁻	⁻	⁻	⁺	⁺	⁺	⁺	⁺
Fluorescein^*	⁻	⁺	⁺	⁺	⁺	⁺	⁺	⁺
Green water dye^*	⁻	⁻	⁻	⁻	⁺	⁺	⁺	⁺
Vitamin B2 (nebulized)	⁻	⁻	⁺	⁺	⁺	⁺	⁺	⁺
Vitamin B2 (irrigation)	⁻	⁻	⁻	⁺	⁺	⁺	⁺	⁺

^{Note. *}

no visibly apparent fluorescence under UV light.

⁺

Denotes presence of particle aggregates.

⁻

No particles present at the specific impactor stage.