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Selenium Testing in Water Samples by Guadalupe is a document available to read on EtoBox.
Selenium levels in natural waters are typically below 0.01 mg/L and rarely exceed 0.50 mg/L. The Diaminobenzidine Extraction Method uses the diaminobenzidine indicator, which develops a yellow color in the presence of selenium. This method specifically measures tetravalent selenium (Se4+). An EDTA masking agent is added to remove interferences before formic acid adjusts the pH. Diaminobenzidine then reacts with Se4+ to form a yellow piazselenol complex, which can be extracted into toluene for measurement at
- Author
- Guadalupe
- Language
- EN