Gold Tester GD320N Atomic Absorption Spectrophotometer Making the characteristic concentration of As, Se, Sb, Bi, Pb, Sn, Te, ... to ensure a high precision analytical test and low characteristic concentrationOptical path of high energy: A total reflection system ... oxide-acetylene flame analysis.Hydride generator (Totally automatic): Making the characteristic concentration of As, Se, Sb, Bi, Pb, Sn, Te ...