Calcium Absorption Essay Example for Free

Calcium assiduity EssayIn order to determine the content of atomic number 20 and milligram in an unknown consume of limestone, the utilization of atomic absorption spectrophotometry can help in deciphering the unknown concentrations of each molecule in the limestone sample. Atomic absorption spectrophotometry, emits radiation of the correct frequency that is passed through a flame and the intensity of the transmitted radiation is measured?. The calcium concentration or ppm can be measured using the absorbance of the root and comparing it to a modular curve for calcium?. Whereas magnesium, needs to be determined using the standard addition method.The concentrations of each respective molecule can be presented as CaO and MgO percentages of the unknown limestone sample. Materials and Methods The compound calcium carbonate (CaCO3, CAS 471-34-1, 204. 89ppm) was utilized to compare its absorbance to the unknown sample of limestone 8066 on the standard curve. Moreover, magnesium sulfate heptahydrate (MgSO4*7H2O, CAS 10034-99-8, 40. 8ppm) was also utilized to compare its absorbance against that of the unknown. Lab personnel from the CSU Eastbay department of chemistry stockroom performed all calibrations on the Perkin Elmer AAnalyst three hundred atomic absorption spectrometer.All chemicals used in this experiment were obtained from the CSU Eastbay department of chemistry stockroom. A capital of Colorado Instrument Co. Sargent-Welch analytical balance was used to determine the mass of the unknown, mass of calcium carbonate, and mass of magnesium sulfate heptahydrate. A Perkin Elmer AAnalyst 300 atomic absorption spectrometer equipped with a Lumina Calcium and atomic number 12 Lamp was used to determine the absorbance. The instrument used Argon and Acetylene as the carrier gas and oxidiser gas, respectively.