Abstract:The effect of inorganic ions on the interaction between Methylene Blue and K and A carrageenan fractions and carboxymethylcellulose (CMC) has been investigated using visible absorption spectroscopy. The concentration of ions required to remove completely Methylene Blue (MB) from the MB-polyanion comp1exi.e. the limiting salt concentration, has been determined and found to decrease in the order Li+ > Na+ > K+ > Cs+, and Mg2+ > Ca2+ > Sr2+ for carrageenans and K+ > Na+ and Mg2+ > Ca2+ > Sr2+ for CMC. Comparing i… Show more
Die Grenzkonzentrationen, oberhalb derer eine Komplexbildung zwischen Methylenblau und den Titelanionen (Metachromasie) nicht mehr stattfindet, nimmt von Li zu Cs und von Mg" zu Sr" für die Carrageenan‐ Anionen ab.
Die Grenzkonzentrationen, oberhalb derer eine Komplexbildung zwischen Methylenblau und den Titelanionen (Metachromasie) nicht mehr stattfindet, nimmt von Li zu Cs und von Mg" zu Sr" für die Carrageenan‐ Anionen ab.
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