Formaldehyde-DNPH Level 4 (2ug/mL)

3,5,6-trichloro-2-pyridinol(4,5,6-13C3, 99%) cp 97%, 100ug/ml in Acetonitrile, 1,2ml

Irgarol-d9 (tert-butyl-d9),100 µg/mL,acetonitrile,1mL,

Phosphate as (PO4-3), 1000µg/ml in water, 100ml