Comparative Analysis of EBiS Instrumentation to Determine DNA Concentrations
摘要
Determination of human genomic Deoxyribonucleic Acid (DNA) is an essential procedure in molecular biology studies. However, specialized equipment for this purpose is not always available in resource-limited settings. Development of innovative, cost-effective, and easy-to-use devices for estimating DNA concentrations remains a relevant technological challenge. Electrical Bioimpedance Spectroscopy (EBiS) is a relatively simple and low-cost technique for exploring the electrical properties of biological analytes, and has been previously proposed for DNA quantification. In this study, the use of EBiS based on the EVAL-AD5933EBZ is proposed as a low-cost and easy-to-use technique for detection of DNA concentrations. A small sample size (n = 10) with DNA concentrations within a useful range for molecular biology assays (10 to 25 ng/μL) was used as proof of concept. EBiS measurements trough the AD5933EBZ in the range of 5 to 50 kHz were compared to a calibrated multifrequency bioimpedance meter as reference parameter to determine a percentage error. EBiS magnitude values showed a reduction in error with increasing frequency. In contrast, an increased error for phase values is shown as a function of frequency. The EVAL-AD5933EBZ showed a relatively low and potentially acceptable percentage error (±10%) for magnitude and phase values in the selected frequency range.