Gửi tin nhắn: Simultaneous effect of pH, deposition time, deposition potential, and step potential on the stripping peak current of lead and cadmium by response surface methodology / Thi Lieu Nguyen, Van Hoang Cao, Thi Dieu Cam Nguyen, Thi Thanh Binh Nguyen, Quoc Trung Pham, Truong Giang Le