... at two different channels by time-sharing at trace level (ppt), such as As,Se,Hg,Sb.. Technical Parameter:DL: As ... at two different channels by time-sharing at trace level (ppt), such as As,Se,Hg,Sb,Pb,Cd,Te,Sn ... and surface water (DL≤0.0002μg/L). Applications: Food, Public Health, Environmental, Geochemical, Metallurgical, Water, Agricultural, Clinical, Education, Cosmetic, Soil, Animal ...