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2 results on '"Fengmao Guo"'

1. Quantifying the available soil phosphorus pool with the acid ammonium oxalate method.

Author

Fengmao Guo and Yost, Russell S.

Subjects
*PHOSPHORUS in soils, *FERTILIZERS, *OXALATES
Abstract

Determines whether oxalate can be used as an extractant for estimating the available phosphorus pool in soils. Availability of oxalate extractable phosphorus in soils; Estimation of oxalate extractable phosphorus versus the available phosphorus using the Hedley method; Phosphorus content of slightly weathered soils.

Published
1999
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2. Na4EDTA-assisted sub-/supercritical fluid extraction procedure for quantitative recovery of polar...

Author

Fengmao Guo and Li, Qing X.

Subjects
*SUPERCRITICAL fluid extraction, *ETHYLENEDIAMINETETRAACETIC acid
Abstract

Demonstrates a supercritical fluid extraction procedure for quantitative recovery of polar and nonpolar chemicals from soils. Use of (ethylenedinitrilo)-tetraacetic acid tetrasodium salt (Na4EDTA) in pretreatment procedure; Effect of Na4EDTA on extraction efficiency; Effect of soil moisture on polar analytes recovery; Extraction of carboxylic acids and phenols.

Published
1999
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