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A Comparison of Plant Digestion Methods for Identifying Soil Contamination of Plant Tissue by TI Analysis¹

Five plant tissue digestion procedures were evaluated for their ability to extract Ti from soil. Sulfuric-selenous and nitric-perchloric acid procedures each extracted large amounts of Ti from soil, and therefore, soil contamination of plant tissue samples can be identified by using either of these digestion procedures. Both of these procedures also extracted relatively large amounts of Al, Fe, Mg, and Ca from soil. Nitric acid and dry ash plus HCI extraction methods were inadequate for determining soil contamination by Ti analysis.

Key Words: Titanium • Aluminum • Plant digestion procedures

² Former postdoctoral fellow (present location: Dep. of Agronomy, Purdue Univ.) and professor, Dep. of Agronomy, Louisiana State Univ., Baton Rouge, LA.

Received for publication February 26, 1982.

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