SELECTIVE PRECONCENTRATION OF ARSENITE ON MERCAPTO-MODIFIED SILICA-GEL

Date

1987-02-01

Author

HOWARD, AG
Volkan, Mürvet
Ataman, Osman Yavuz

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A surface-modified silica gel has been developed for the pre-concentration of arsenite from natural waters. The reaction of silica gel with (3-mercaptopropyl)trimethoxysilane produces a mercapto-modified silica gel with a silver capacity of ca. 0.9 mmol g–1. This material selectively removes arsenite from samples that also contain arsenate, monomethylarsonate and dimethylarsinate, and can be employed for both the column and batch pre-concentration of arsenite. Under column and batch conditions recoveries of ca. 96 and 94% are obtained but reproducibility is better for the column technique.

Subject Keywords

Mercapto-silica, Silica gel, Water analysis, Arsenite pre-concentration, Arsenic determination

URI

https://hdl.handle.net/11511/30380

Collections

Graduate School of Natural and Applied Sciences, Article