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Hanna Checker Instructions for Phosphorus ULR Standards:
- 1. Thoroughly wipe standard cuvette with HI731318 lint free cloth and only handle using top of cuvette. The cuvette wall must be dry and free of smudges.
- 2. At the C. 1 prompt, place A, HI736-11 standard cuvette into the holder of the Checker and press operations button.
- 3. At the C. 2 prompt, place B, HI736-11 standard cuvette into the holder of the Checker and press operations button.
- Acceptable results must be between 90 and 110 ppb at 25°C
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