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Analysis of cells is important for medical research and pharmaceutical industry. This paper presents a new technique for sorting blood cells on a bio-analysis platform that combines the magnetophoretic force and hydrodynamic force as the means of cell manipulation. The integration of these two techniques can improve on-chip sorting ability which could result in high throughput compared to microfluidic system that uses hydrodynamic method alone. Here, studies on the magnetic density that profiled the actual magnetophoretic force and the hydrodynamic force analysis were conducted using COMSOL Multiphysics v4.2 software. These simulations are important in order to assess magnetophoresis performance during experiments. The suggested model is capable of separating target cells from a heterogeneous population which can be applied for detection purpose particularly in cell biology, immunology, stem cell research, and other clinical applications. [ABSTRACT FROM AUTHOR]