Nitrate (NO3-) as N

2,3'-Dichlorobiphenyl ,100 µg/mL,isooctane,1mL,

Tris(4-isopropylphenyl) phosphate, 1.2ml x 50ug/ml, toluene

4-Chloro[13C12]diphenyl ether, 1.2ml x 50ug/ml, nonane