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The Salifert Nitrate Test is easy to use and gives accurate and quick results with a total testing time of less than 3 minutes. The kit can perform approx. 60 measurements. The test kit’s range goes from a very low to a very high nitrate concentration (approx. 0.05 – 20 mg/L as Nitrate-Nitrogen or 0.2 – 100 mg/L as nitrate ion).