7-Hydroxy Methotrexate-d3 Ammonium Salt, 1mg

β-1,2,5,6,9,10-Hexabromocyclododecane, 50µg/ml in Toluene, 1,2ml

EPA Method 625 Base/Neutrals Mix #4

EPA Method 8040A - Analytes Mix “B”, 2000µg/mL in 2-propanol, 1ml