Report : Experiment 3.5 – Analytical 2017
Calcium Analysis by Atomic Absorption Spectrometry
Calibration:
Absorbance values of the standard solutions and calibration plot
Concentration (ppm)
0.5157
0.7032
1.172
2.344
4.688
Absorbance
0.014
0.020
0.036
0.080
0.157
Calibration plot:
Absorbance
Analysis of Calcium Using AAS
0,18
0,16
0,14
0,12
0,1
0,08
0,06
0,04
0,02
0
y = 0,0345x - 0,0036
R² = 0,9993
0
1
2
3
4
5
Concentration (ppm)
Molar Absorptivity of Calcium 138 M-1cm-1
Unknown Sample Analysis
Absorbance of the sample 0.119
Percentage of Calcium in the unknown sample calculated as CaO 47.81%
(Clearly show all calculations in notebook)
1