Research Article
Determination of Metals in Natural Waters by Inductively Coupled Plasma Optical Emission Spectroscopy after Preconcentration on Silica Sequentially Coated with Layers of Polyhexamethylene Guanidinium and Sulphonated Nitrosonaphthols
Figure 5
Temperature profiles of gases released during heating of SiO2–PHMG–NNS as measured by FTIR.