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http://hdl.handle.net/10174/4580
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Title: | In situ continuous monitoring of chloride, nitrate and ammonium in a temporary stream. Comparison with standard methods. |
Authors: | Capelo, Sofia Mira, Francisco Alexandre, Bettencourt |
Keywords: | Ion selective electrodes Environmental analysis Temporary stream Chloride Nitrate Ammonium |
Issue Date: | 11-Jul-2006 |
Abstract: | A multi-parameter probe was used for in situ chloride, nitrate and ammonium measurements in a temporary stream (Ribeira da Pardiela, in the
South of Portugal). Comparison with standard analytical methods was performed for all elements. For chloride, the results of the probe depicted
the same behaviour as that obtained with the standard method, although it is clear that the matrix effects were present. For nitrate, the results
obtained with the probe were in agreement with the other standard methods used, except for samples collected during drought, when the stream
water became brownish and exhaled an offensive smell, due to the decomposition of organic matter. For ammonium, surprisingly the probe show
to be the best option, the phenate method being affected by matrix effects. The results still suggest an interference of the bicarbonate ion on nitrate
determination, but standard additions approach was shown to minimize most of the matrix effects. Recoveries were reasonable to good for all the
three anions under scrutiny. |
URI: | http://hdl.handle.net/10174/4580 |
Type: | article |
Appears in Collections: | PAO - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
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