1. College of Science, Northeastern University, Shenyang 110004, China 2. Liaoning Province Center for Disease Control and Prevention, Shenyang 110005，China
Abstract：Water-touched material include water distribution equipment, protecting materials, and water treatment material. The security of the material plays an important role in everyone’s daily life. So it’s necessary to determing metal elements in the material. A method for the determination of eleven elements, including Ag, As, Ba, Cd, Cu, Sb, Sn, Mn, Ni, Pb and Hg, in the water-touched material by inductively coupled plasma-mass spectrum(ICP-MS) is described. The plasma parameters were optimized as follows: The RF input power was 1 350 W; flow rate of cooling gas was 13 L·min-1; flow rate of assistant gas was 0.70 L·min-1; flow rate of carrying gas was 0.8 L·min-1; flow rate of atomization gas was 1.02 L·min-1; rate of sampling was 1.48 mL·min-1. The detection limits of these eleven elements were 0.003-0.170 μg·L-1. The relative standard deviations(n=6) were 0.6%-6.3%. The correlation coefficients were 0.999 0-0.999 6. The recoveries of the method were 92.4%-108.2%. This method is sensitive, accurate and simple compared with other methods, and has the advantage of wide linear range. The results were satisfactory.
Key words：ICP-MS;Water-touched material;Maring water
