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【Daily Question】Chemical Analysis Version 2018.11.16

2018-11-16View Original

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This post was last edited by zjp on 2018-11-16 08:44. Multiple-choice question: When using the Kjeldahl method to determine the nitrogen content in organic substances, selenium powder acts as a catalyst and improves efficiency; however, if too much selenium powder is used, it will cause (). A. The measurement result is low B. The measurement result is high C. Nitrogen loss D. Increase in nitrogen AC

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