Dosing spoons

Concentration 10,000 +/- 100 ug/ml Matrix: 5% Nitric acid NIST Traceable

AA, colorimetric or volumetric standard. Concentration 1,000 +/- 10 ug/ml Matrix: 5% Nitric acid w/ trace HF NIST Traceable

For all EPA 180.1 turbidimeters

TEST Turbidity 300 NTU Absorbance at 455nm (10mm pathlength) Lot Number of Baseline Material

TEST Turbidity 80 NTU +/- 0.8 Absorbance at 455nm (50mm pathlength) Lot Number of Baseline Material

TEST Turbidity 60 NTU +/- 0.6 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

Turbidity 40 NTU +/- 0.4 Absorbance at 455nm (50mm pathlength) Lot Number of Baseline Material

TEST Turbidity 6.0 NTU +/- 0.06 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

TEST Turbidity 2.0 NTU +/- 0.02 Absorbance at 455nm (100mm pathlength) Lot Number of Baseline Material

AA, colorimetric or volumetric standard

TEST Turbidity 800 NTU +/- 8 Absorbance at 455nm (10mm pathlength) Lot Number of Baseline Material

AA, colorimetric or volumetric standard