Experiment 32 The Analysis of Snack Chips for Sodium by Atomic Absorption

Experiment 32 The Analysis of Snack Chips for Sodium by Atomic Absorption 

Note It is presumed that you have previously performed Experiment 29 or another introductory experiment on the atomic absorption equipment. If you have not done this, carefully read through the Experiment 29 procedure so that you are aware of certain precautions and instrument setup requirements. 

Prepare an HC1 solution by diluting 100 mL of concentrated HC1 with 44 mL of water. 

Prepare sodium standards (by diluting 1000 ppm Na) that are 1, 3, 5, and 7 ppm. A control may also be provided. These should be approximately 0.5% HC1 by volume. 

Prepare samples (maximum of two) by grinding and weighing 5 g of each into 500-mL Erlenmeyer flasks. Add 50 mL of the HC1 solution prepared in step 1 to each. Bring each to a boil on a hot plate, and then simmer for 5 min. Cool and transfer the supernatents for each to separate 100-mL volumetric flasks. Dilute to the mark with distilled water and shake. Filter each through Whatman 1 filter paper into dry 250-mL Erlenmeyer flasks. Pipet 1 mL of each of these extracts into other clean 100-mL volumetric flasks, and dilute to the mark with water. Save the original extracts in case more dilutions are needed. 

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