COD Standard, 500 ppm Concentration 500 ml – C-50D (C50D) – NC Labs Products

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COD 500 mg/L Calibration Standard certified reference material

Conductivity Calibration Standard 3-Pack — 500 mL (1.06 Pint) Each: 84 μS, 1,413 μS and 12,880 μS: : Industrial & Scientific

COLLOIDAL Silver 500 PPM, 4 OZ Bottle

Mettler-Toledo conductivity standard Conductivity: 12.88 mS/cm, volume 30 x 20 mL , sachets

Calibration Gas Carbon Monoxide 50 PPM, Methane 50% LEL, Hydrogen Sulfide 25 PPM, Oxygen 12

COD Standard Solution, 300 mg/L as COD (NIST), 500 mL

500 mg/l - Biological oxygen demand BOD Reference Standard solution

600-0050-070, equivalent by GASCO, 50 PPM Carbon Monoxide, 50% LEL Methane, 10 PPM Hydrogen Sulfide, 18% Oxygen, Balance Nitrogen, Calibration Gas

COD Standard Solution traceable to NIST, 50000 mg/L in H2O