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在测定CrO_3时,发现H_2S对显色有明显的抑制作用,为此建立了用二苯碳酰二肼比色间接测定空气
In the determination of CrO_3, H_2S was found to have a significant inhibitory effect on the color, thus establishing a diphenylcarbazide colorimetric indirect determination of air