Total Kjeldahl Nitrogen as N

n-Nonadecane, ?13C: -34.60, 150µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-1, Cas.no. 629-92-5

2-Ethylhexyl 2,3,4,5-tetrabromobenzoate, 1.2ml x 50ug/ml, toluene

n-Undecane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 1120-21-4