The paper erects math model of determined ammomial nitrogen compound uncertainty by prismatic photometer.

建立了分光光度法测定水中氨氮含量的合成不确定度的数学模式.

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This article introduces the mechanism, application and effect of anti - block agent in high - nitrogen compound fertilizer ( N: 25 % ~28 % ).

介绍适用于含氮25%～28%高氮复混肥 防 结块剂的防结块机理 、 使用情况及防结块效果.

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