Experiment 6. Atomic Absorption Spectroscopy

Kangkong and kamote tops were used as samples for the experiment. Atomic absorption spectroscopy

was used to determine the copper content of the samples. Following are the data obtained from the

experiment.

Absorbance of standards

Standard Concentration (ppm) Absorbance

Blank 0 0.0123

1 1.00 0.1937

2 2.50 0.3685

3 5.00 0.6789

4 10.00 1.1751

Absorbance of samples

Kangkong:

Sample Absorbance

1 0.0498

2 0.0475

3 0.0475

Kamote:

Sample Absorbance

1 0.1219

2 0.1278

3 0.1134

Standard addition Method

Kangkong:

Standard Volume of solution (mL) Absorbance

Trial 1 Trial 2 Trial 3

1 0.00 0.0119 0.0127 0.0133

2 0.50 0.1619 0.1632 0.1612

3 1.25 0.3350 0.3311 0.3282

4 2.50 0.6165 0.6147 0.6148

5 5.00 1.0855 1.0820 1.0820

Kamote:

Standard Volume of solution (mL) Absorbance

Trial 1 Trial 2 Trial 3

1 0.00 0.0272 0.0261 0.0276

2 0.50 0.1696 0.1679 0.1733

3 1.25 0.3308 0.3315 0.3317

4 2.50 0.6200 0.6191 0.6202

5 5.00 1.1073 1.1078 1.1088