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pH是一种相对测量,其标准是pH标准缓冲溶液。生产的每批pH标准物质都必须经过检定,确定其pH值是否与pH基准缓冲溶液的pH值在误差允许范围内相符合,这样才能保证pH测量的准确一致。国外文献中一般采用氢电极—甘汞电极有液接界电池检定pH标准物质。本文介绍的是改用双氢电极有液接界电池检定pH标准物质,经过多年试用,效果良好,提高了检定的精确度及工作效率。
pH is a relative measure, the standard is pH standard buffer solution. Each batch of pH standards produced must be verified to determine if their pH matches the pH of the pH-based buffer within the tolerance of the error, in order to ensure accurate and consistent pH measurements. Foreign literature generally use hydrogen electrode - calomel electrode with liquid junction cell test pH standards. This article describes the use of double hydrogen electrode with a liquid junction battery pH test material standards, after many years of trial, the effect is good, improve the accuracy of the test and work efficiency.