Table 1 Characteristics of dyes tested in this work
Dyes | Type | λmax (nm) | Chemical formular |
|---|---|---|---|
Orange G6 | Azo | 469 | C16H10N2Na2O7S2 |
Orange I | Azo | 467 | C16H12N2O4S·Na |
Methyl orange | Azo | 461 | C14H15N3NaO3S |
Ponceau S | Azo | 501 | C13H9N3NaO5 |
Alizarin yellow R | Azo | 373 | C22H14N6Na2O9S2 |
Solvent red 24 | Azo | 232 | C24H20N4O |
Amaranth | Azo | 508 | C34H32ClN3NaO6S2 |
Chromotrope 2R | Azo | 504 | C16H10N2Na2O8S2 |
Alizarin | Anthraquinone | 417 | C14H7NaO7S |
Methylene blue | Anthraquinone | 682 | C16H18N3ClS |
Fast green3 | Triaromatic methane | 618 | C37H34N2O10S3Na2 |
Aniline blue | Triaromatic methane | 582 | C32H25N3Na2O9S3 |
Coomassie brilliant blue | Triaromatic methane | 595 | C45H44N3O7S2Na |
Brilliant green | Triaromatic methane | 623 | C27H34N2O4S |
Eosin | Triaromatic methane | 522 | C20H6Br4Na2O5 |
Water-soluble melanin | Cyanine | 533 | C24H19N4 |
Eosin Y | Three aryl methyl | 523 | C36H27N3O5Br4S |
Bromothmol blue | Three aryl methyl | 420 | C27H28Br2O5S |
Bromophenol blue | Three aryl methyl | 422 | C19H10Br4O5S |
5,5′-Dibromo-o-cresolsulfonphthalein | Three aryl methyl | 648 | C21H16Br2O5S |
Safranine T | Heterocyclic | 530 | C20H19N4Cl |
Neutral red | Heterocyclic | 440 | C15H17ClN4 |