od optical density difference
... OD optical density difference 吸光度差 image density difference 光之下的影像强度 fluid density difference 流体密度差 ...
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本文试用高吸光度差示法对部分磷肥样品含磷量进行了测定，并与经典方法作了对照试验，结果非常一致。
High absorbance spectrophotometry was used for the determination of phosphorus in chemical fertilizer samples. The experimental results obtained were in good agreement with those by classical methods.
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