Supplier Page from Thermo Fisher Scientific for Selenium, plasma standard solution, Specpure:r, Se 10,000µg/mL
2-Ethylaniline, 98% from Thermo Fisher Scientific
4-Ethylaniline, 99+% from Thermo Fisher Scientific
9-Fluorenone, 99+% from Thermo Fisher Scientific
Fluorescein, pure from Thermo Fisher Scientific