Table 4. Dilution factors, expected concentrations, measured concentrations, and dilution recovery of diluted samples used in the tests of the dilution recovery range for assaying NFL using the IMR NFL reagent.

Dilution factor	Expected concentration (pg/ml)	Measured concentration (pg/ml)	Dilution recovery
2X	50.93	52.63	103.3%
5X	20.37	20.43	100.3%
10X	10.19	10.56	103.7%
20X	5.09	5.36	105.2%
50X	2.04	2.11	103.5%
100X	1.02	1.03	101.1%