Oxygen Scavengers
Oxygen Scavengers
OxygenSca_PP_Other_IRD_Eng_Ody.fm Page 3 of 4
Interferences
Substances which reduce ferric iron will interfere. Substances which complex
iron strongly may also interfere.
Sample Collection, Preservation, and Storage
Collect samples in clean, dry, plastic or glass containers. Avoid excessive
agitation or exposure to sunlight when sampling. Rinse the container several
times with the sample. Allow the container to overflow and cap the container so
that there is no headspace above the sample. Rinse the sample cell several times
with sample, then carefully fill to the 25-mL mark. Perform the analysis
immediately.
Method Performance
Precision
See Section 3.4.3 Precision on page 44 for more information, or if the standard
concentration did not fall within the specified range.
Interfering Substance Interference Levels and Treatments
Borate (as Na
2
B
4
O
7
) Greater than 500 mg/L
Cobalt Greater than 0.025 mg/L
Copper Greater than 8.0 mg/L
Ferrous Iron All levels
Hardness (as CaCO
3
) Greater than 1000 mg/L
Light Light may interfere. Keep sample cells in the dark during color development.
Lignosulfonates Greater than 0.05 mg/L
Manganese Greater than 0.8 mg/L
Molybdenum Greater than 80 mg/L
Nickel Greater than 0.8 mg/L
Phosphate Greater than 10 mg/L
Phosphonates Greater than 10 mg/L
Sulfate Greater than 1000 mg/L
Temperature Sample temperatures below 22 °C or above 28 °C (72 °F or 82 °F) may affect test accuracy.
Zinc Greater than 50 mg/L
Program Standard Level 95% Confidence Limits of Distribution
180 375 µg/L 370–380 µg/L
181 280 µg/L 276–284 µg/L
182 750 µg/L 740–760 µg/L
183 1100 µg/L 1085–1115 µg/L
184 750 µg/L 735–765 µg/L
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