Ahmad A, Ruzairi R, Han PW, Ismail AK, Abdul Manaf MS, Ahmad N, Mohammad EJ, Abdul Wahab Y, Zakaria Z, Chan KS. Gold Purity Determination Using Ultrasonic Wave: A Review. TSSA [Internet]. 2023 Jun. 22 [cited 2026 Sep. 20];6(1):52-60. Available from: http://tssa.my/index.php/jtssa/article/view/218