Gabbasa, M.A., Salem, B.A. and Alajami, M.M. 2025. Measuring the Concentration of Preservative Benzoic Acid of Tomato Paste Samples by Spectrophotometer Analyzer. University of Zawia Journal of Natural Sciences. 2, 1 (Mar. 2025), 20–25. DOI:https://doi.org/10.26629/uzjns.2025.04.