NI 순도 Fe Co P C Si Cd O Cu Sn S Mg 니켈 (Ni) 99.95 0.04 0.05 * 0.03 * * * 0.01 * 0.001 0.0042 전해니켈 (Electrolytic Ni) 99.5 0.2 0.1 0.003 0.02 * 0.02 * 0.04 0.0025 0.003 * 카르보닐 니켈 (Carbonyl Ni) 99.8 0.002 0.001 * 0.086 * * 0.19 * * 0.0029 *