| Autor: |
Shimizu, Mahiro, Aikawa, Shunichi, Fukushima, Yasumasa |
| Předmět: |
|
| Zdroj: |
Coloration Technology; Oct2023, Vol. 139 Issue 5, p544-551, 8p |
| Abstrakt: |
This study develops a sensitive and selective colorimetric probe for the detection of dihydrogen phosphate (H2PO4−) based on a lead ion (Pb2+) complex of a commercially available pyridylazo dye (PAPS) in aqueous media under physiological conditions. The complex was made by adding Pb2+ to PAPS in a 1:1 stoichiometric ratio (PAPS‐Pb2+), which was accompanied by the remarkable solution change from yellow to purple. The colorimetric sensing of H2PO4− over other anions with PAPS‐Pb2+ occurred owing to the regeneration of original PAPS by the interaction of H2PO4− with Pb2+ in a 1:2 molar ratio. Moreover, the H2PO4− detection was less affected by the presence of other coexisting competitive anions. The colorimetric naked‐eye behaviour of PAPS‐Pb2+ rendered a useful and convenient probe for the detection of H2PO4− via the indicator displacement assay. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Plný text