245 SULFATE-SULFUR IN SATURATED PASTE EXTRACT
Saturated Paste Extract: SO4S
Concentration of sulfate-sulfur in the saturated paste extract, by ICP-AES.
Summary: This method quantitatively measures the concentration of sulfate in the extract of the saturated paste. It is based on the determination of sulfate sulfur in the extract using an Inductively Coupled Plasma Atomic Emission Spectrometer (ICP-AES). Sulfate uptake by plants can be related to the sulfate concentration in the saturated paste extract. The method has a detection limit of approximately 0.1 mg L-1 and is reproducible within 8%.
Rhoades, J. D. 1982. Soluble salts. p. 167-179. In: A. L. Page et al. (ed.) Methods of soil analysis: Part 2: Chemical and microbiological properties. Monograph Number 9 (Second Edition). ASA,