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27 Nov 2019

Cobalt was used as an internal standard to analyze a sample oftitanium with atomic absorption spectroscopy. A mixture wasprepared by combining a 4.00 mL Ti solution of unknownconcentration with 3.00 mL of a 11.7 micrograms/mL solution of Co.The atomic absorbances were measured as 0.128 and 0.218 for Ti andCo, respectively.

As a reference, a standard mixture containing 1.58 micrograms Co/mLand 2.31 micrograms Ti/mL was prepared and measured to have asignal-to-signal ratio of 2.65 Ti: 1.00 Co.

Determine the concentration (moles/L) of titanium in the originalunknown solution.

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Reid Wolff
Reid WolffLv2
7 Jul 2019

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