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. 2014 Jan 29;28(3):229–236. doi: 10.1002/jcla.21671

Table 2.

Linearity of the Freelite™ FLC Assay on the SPAPLUS™ Using Multiple Dilutions of Patient Serum Pools

Measuring interval
claimed by manufacturer Allowable nonlinearity Tested range Linear fit
Lower Upper Lower goal for Upper goal for
Analyte (mg/l) limit limit levels 1 and 2 levels 3–5 Slope y Intercept SE of fit
κFLC 4.0 180.0 <9.7 mg/l >9.7 mg/l 9.68 152.25 1.020 1.000 3.512
3.60 mg/l 7.95%
λFLC 4.5 165.0 <5 mg/l >5 mg/l 4.96 171.09 0.996 −5.120 5.833
5.30 mg/l 11.4%