An Environmentally Friendly Flow Injection-Gas Diffusion System Using Roselle (<i>Hibiscus sabdariffa</i> L.) Extract as Natural Reagent for the Photometric Determination of Sulfite in Wines

<div>Recorder output of a routine run. Number of replicates: 3; left: standard solutions, right: sample; inset: plot of the analytical curve.</div>

Journal of Analytical Methods in Chemistry

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Figure 5

Figure 5: An Environmentally Friendly Flow Injection-Gas Diffusion System Using Roselle (<i>Hibiscus sabdariffa</i> L.) Extract as Natural Reagent for the Photometric Determination of Sulfite in Wines 

Figure 5 | An Environmentally Friendly Flow Injection-Gas Diffusion System Using Roselle (Hibiscus sabdariffa L.) Extract as Natural Reagent for the Photometric Determination of Sulfite in Wines 