Kotchabhakdi, N. . “Simple Coating of Zinc Powder on Foam Tape Based on a Downscaling Procedure for Nitrate Determination in Vegetable Samples”. Journal of Current Science and Technology, vol. 12, no. 1, Feb. 2023, pp. 52-60, https://ph04.tci-thaijo.org/index.php/JCST/article/view/319.