EPA Method 502/524 Fortification Solution

1,4-Diaminobutane, 250mg

2,5-Dimethoxy-2,5-dihydrofuran (cis, trans mixture)

Diethylene glycol mono(4-n-nonylphenyl) ether-13C6, 10µg/ml, Solvent-Isooctane, Unit 1mL, # of units-1, Cas.no. 1346602-11-6