Supplier Page from Thermo Fisher Scientific for Ammonium, Ion chromatography standard solution, Specpure:r, NH{4}:+ 1000µg/mL
2-Ethylhexanoic acid, 99% from Thermo Fisher Scientific
Ethyl 2-mercaptoacetate, 99% from Thermo Fisher Scientific
Ethyl trifluoroacetate, 99% from Thermo Fisher Scientific