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The present paper re-examines the widely used flow injection method for nitrate which is based on heterogeneous reduction of nitrate with copperized cadmium followed by spectrophotometric detection of nitrite formed. The thorough investigation presented here has shown that the reduction step is very critical as far as conversion rate, possible further reduction of nitrite and long-term stability of...
. Flow injection analysis (FIA) is presented as a powerful tool to meet the analytical requirements of environmental and agricultural assays in terms of automation, monitoring, microsampling, speciation and sample processing. Its potentials and limitations are critically discussed and demonstrated in the body of the text with relevant examples devoted to water, air, soil and plant analysis. The features...
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