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For the first time a new, sensitive, and simple bead injection spectroscopy-flow injection analysis (BIS-FIA) system with spectrofluorimetric detection is described for the sequential determination of two metals. The sensor is based on the alternate use of two carriers and a commercially available flow cell (Hellma 176-QS). The flow cell is filled by injecting in the flow system 500μl of a homogeneous...
Nitrate determination in waters is generally carried out with cadmium filings and carcinogenic reagents or by reaction with phenolic compounds in highly concentrated sulfuric acid medium. In this work, it was developed a green analytical procedure for nitrate determination in natural waters based on direct spectrophotometric measurements in ultraviolet, using a flow-injection system with an anion-exchange...
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