exp#4 - Introduction I. Objective: The Maine objective of...

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Introduction I. Objective: The Maine objective of this experiment is to determine the concentration of copper in a copper ore. II.Theory: This experiment explains how can we use the atomic absorption spectrophotometer to find the concentration of an element in a given sample. Basically atomic absorption spectroscopy depends upon the fact, that certain wavelengths of radiation emitted by an excited atom, will be strongly absorbed by unexcited atoms of the same element; provided that these unexcited atoms are the gaseous state. The emission line at 324.7 nm is selected from a Hallow Cathod Lamp ( HCL ) for copper. For this purpose, a sample of the ore was dried, weighted, and the copper was leeched from it using an acid treatment. The sample prepered in a known volume of solution was introduce to the spectrophotometer by means of a pneumatic neblizer. Then, the copper was determined using the external standards calibration curve method.
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exp#4 - Introduction I. Objective: The Maine objective of...

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