| The tungsten is then stripped from the extractant into an ammonia solution containing ammonium tungstate. |
| Potassium hydroxide may also be used as an extractant but may not be used to fortify the potassium analysis. |
| Extraction of valeric acid was significantly enhanced by the presence of a carboxylic acid in the toluene extractant, or the aqueous feed, or both. |
| The extractant is adsorbed on the surface of an inert support and corresponds to the organic, stationary phase. |
| The first step to designing a soil test program is selecting the chemical extractant. |
| The extractant, which is determining the capacity of the resin, has to have a high selectivity and needs to be chemically and physically stable. |
