Real-time Quantitative Analysis of L-Lysine Based on Radio Frequency Sensing

L–Lysine is an essential amino acid and bio–sample observing major significance in food processing, pharmaceutical and agricultural industries. Conventional sensing techniques require longer pre–processing times and are sensitive to ambient conditions. However, radio frequency (RF) sensing based on Complementary Split Ring Resonator (CSRR) exhibits a significant shift in the resonant frequency and is highly desirable for the L-Lysine's quantitative analysis. The frequency shifts of 498.4 MHz, 482.9 MHz, 471.4 MHz, 459.9 MHz and 452.3 MHz are obtained through varying concentrations from 0 mg/ml to 40 mg/ml in step size 10 mg/ml of L-Lysine solution. Therefore, experimental results and analysis presented in this work indicate the proposed radio frequency sensor's linearity in the above-reported concentration range.