Supplier Page from Thermo Fisher Scientific for Selenium standard solution, for AAS, 1 µg/mL Se in 10% HCl
2-Ethylaniline, 98% from Thermo Fisher Scientific
3-Fluorobenzaldehyde, 98+% from Thermo Fisher Scientific
Ethylenediamine, 99% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific