Total Residual Free Chlorine (Cl) Back Catalog number: 54224 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72121 Carbamazepine, 1000µg/ml in MeOH, 1ml Price on request S-4502-3K-25IO Phosphorous Standards Phosphorus in Isooctane Tri-n-butylphosphate, 99+% (Chiron product nr. 1399.19) CAS [126-73-8] Matrix: Isooctane , 20cSt Units: 1x25mL, 1x100mL Isooctane Price on request 11207.12-50-ME 1H,1H,2H,2H-Perfluoro-n-octyl methacrylate-d5,50 µg/mL,MeOH,1mL, Price on request