Cobalt was utilized as an internal standard to examine a sample of titanium with atomic absorption spectroscopy. A mixture was prepared by combining a 4.50mL Ti solution of unknown concentration with 3.00mL of a 14.8 g/mL solution of Co. The atomic absorbances were measured as 0.105 and 0.201 for Ti and Co respectively. As a reference, a standard mixture containing 2.14 g Co/mL and 1.27 g Ti/mL was prepared as well as measured to have a signal-to-signal ratio of 2.53 Ti: 1.00 Co.

Find out the concentration moles/L of titanium in the original unknown solution