Experiment 31 The Analysis of Soil Samples for Iron Using Atomic Absorption

Experiment 31 The Analysis of Soil Samples for Iron Using Atomic Absorption 

Note Soil samples may be dried and crushed ahead of time. If not, you may report the results on an as received basis. 

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. 

Weigh 5.00 g of each soil sample to be tested into dry 50-mL Erlenmeyer flasks. Pipet 20 mL of extracting solution into each flask. Stopper and shake on a shaker for at least 20 min. 

Filter all samples simultaneously into small, dry beakers using dry Whatman 42 filter paper, transferring only the supernatant. Do not rinse the soil samples in the filters, since that would dilute the sample extracts by an inexact amount. 

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