Typical standard curves of CA19-9 ELISA kit (GTX540620).

Sandwich ELISA detection of tumor marker controls using CA19-9 ELISA kit (GTX540620). A, B, and C represent data tested using three different commercially available IVD products.

A. Recovery assay was determined by spiking human CA19-9 at three levels throughout the assay range in the listed samples. B. To determine linearity, the listed samples were spiked with high level human CA19-9 and diluted with Sample Diluent CA1 in 1:2 and 1:4. The value was assessed by comparing it to undiluted samples.