Fig. 4

The magnetic measurements of χac and the hysteresis loop for mixing 40 μL of the Fe3O4-anti-CEA reagent with 60 μL and 10 ppm of a CEA solution. a The dynamic measurement of χac with time. b Before and c after the measurement of χac, the measurement of the hysteresis loop for only the Fe3O4-anti-CEA reagent as well as the mixture of the same reagent and the CEAs

© De Gruyter