人血液细胞介电谱的实验研究

The Experimental Research for Dielectric Spectroscopy of Human Blood Cells

在0.01～100MHz范围内,测量人血液细胞的介电谱,确立人血液细胞对交流电场的介电响应的数据特征。利用频域阻抗技术测量了正常人血液细胞交流阻抗,绘制细胞的介电常数和电导率与电场频率的关系曲线。建立了人血液细胞的介电谱和Cole-Cole图,明确了人血细胞的介电频响的数据特征。在射频电场中,人血液细胞的介电常数和电导率具有频率依赖性,表现为具有两个特征频率的介电弛豫第一介电弛豫发生在fC1为1.42MHz,第二介电弛豫产生在fC2为3.32MHz。

The dielectric spectroscopy of human blood cells was measured within the frequency range of 0.01- 100 MHz, and the dielectric numerical characters were determined as response to AC electric field, we measured the AC impedance of normal human blood cells with the impedance technique in the frequency domain, then the experimental data were drawn a relationship curve between the frequency of electric field and conductivity. The dielectric spectrum and the Cole-Cole plots of human blood cells were established. The characteristics of dielectric response of human blood cells were also established. The permittivity and the conductivity of human blood cells were frequency dependent, and dielectric dispersion of human blood cells had two characteristic frequencies ： i.e. fc; is 1.42 MHz, and fc2 is 3.32 MHz.