论文部分内容阅读
工作原理本方法是根据法拉第电解定律,把经过高温燃烧时试样中的碳转化二氧化碳气体,借助氧气流带入已知 pH 值的过氯酸钡吸收池中,过氯酸钡溶液吸收二氧化碳气体,生成碳酸钡及过氯酸.其反应如下:Ba(ClO_4)_2+CO_2+H_2O→BaCO_3↓+2HClO_4这样就使溶液的 pH 值变化.然后用一对铂金电极,通以一定量的脉冲电流进行电解,使溶液恢复到原来的 pH 值。pH 值的变化则用一对指示电极(玻璃电极与银-氯化银电极)输出,由 pH 电路控制电解池的电解电流。在电解过程中所消耗的脉冲电量,与试样中的含碳量成正比,并用数字管直接显示.
Working principle This method is based on Faraday’s law of electrolysis, the carbon after combustion under high temperature combustion carbon dioxide gas, with oxygen flow into the known pH of the barium perchlorate absorption cell, barium perchlorate solution to absorb carbon dioxide gas , Generating barium carbonate and perchloric acid.The reaction is as follows: Ba (ClO 4) 2 + CO 2 + H 2 O → BaCO 3 ↓ + 2HClO 4 This changes the pH of the solution, and then with a pair of platinum electrodes, through a certain amount of pulse current Electrolysis, the solution returned to its original pH value. The change in pH is then output with a pair of indicator electrodes (glass electrode and silver-silver chloride electrode), with the pH circuit controlling the electrolysis current of the cell. The amount of pulsed electricity consumed in the electrolysis process is proportional to the amount of carbon in the sample and is displayed directly with the digital tube.