Estimating concentration of toxic ions Arsenic in water by using Photonic Crystal Fiber based on Surface Plasmon Resonance (SPR). Baghdad Sci.J [Internet]. 2024 Feb. 1 [cited 2024 May 9];21(2):0445. Available from: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/7651