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      Stopped-in-loop flow analysis of trace vanadium in water.

      Analytical sciences : the international journal of the Japan Society for Analytical Chemistry
      Calibration, Catalysis, Cations, Divalent, analysis, Flow Injection Analysis, Indicators and Reagents, Nitric Acid, chemistry, Spectrophotometry, Atomic, Vanadium, Water Supply

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          Abstract

          The new concept of stopped-in-loop flow analysis (SIL-FA) is proposed, and an SIL-FA method for the catalytic determination of vanadium is demonstrated. In an SIL format, a sample solution merges with reagent(s), and the well-mixed solution is loaded into a loop. The solution in the loop is separated by a six-way switching valve from the main stream. While the reaction proceeds in the stationary loop, the SIL-FA system does not need to establish a baseline continuously. This leads to a reduction in reagent consumption and waste generation compared with traditional flow injection analysis.

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