0.2 to 1.0 ppm, Nitrate, Phosphate
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3119 Octet Comparator Method Color standards for 0.2, 0.4, 0.6 and 1.0 ppm NO3—N Color standards for 0.2, 0.4, 0.6 and 1.0 ppm PO4 Sufficient for 40-50 tests
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