https://www.selleckchem.com/
The capacity was reached to 120.4 μg/m, which is more than 1000 times higher than that obtained by a common method (directly antibody immobilization on a naked capillary). After sample extraction and enrichment by the IT-SPME, the eluent were determined by a particle-enhanced turbidimetric immunoassay (PETIA). Sensitive quantification of HER2-ECD by the PETIA was thereby accomplished. HER2-ECD concentrations in 82 clinical serum samples were determined by the developed IT-SPME/PETIA method, and the results were well-correlated with that by the clinical used
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