Determination of nitrogen analyzer is not in the national certification directory, so the customer purchase azotometer actual measured recovery rate determination, both to understand the products they buy, the actual recovery rate and detection accuracy.

Ammonium sulfate is the standard in the oven drying after two hours, take a certain amount of nitrogen determination apparatus detection, because the nitrogen content in ammonium sulfate is known; we put the actual value of ammonium sulfate detection after drying and the amount of nitrogen and ammonium sulfate is known the ratio of recovery rate. (ammonium sulfate even after drying ammonium sulfate content ≥ 99%, not 100%. According to the 99% meter can actually reach 99.5% or more is better) for your reference.

Nitrogen content if more than 35%, then the recovery rate of the actual test value is more demanding, such as urea, urea, dicyandiamide, phosphoric acid. The recovery rate of more than 99.8% test requirements.

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