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海水PH值是海洋调查中最基本的测定项目之一,是海洋生态理化环境的重要因子。它影响到海水多数元素的存在形式、化学和生物迁移过程;对于海洋生物生态学、海洋污染、海洋腐蚀和海洋界面交换等方面的应用研究和基础理论研究都具有一定的意义。同时,也可作为确定水团的年令、起源和运动的辅助指标。过去,海水PH值的测定一直沿用古老的目视比色法。目视比色法的最大缺点是精度差(约±0.05PH),盐误大(盐度S=35‰时的校正值为0.26PH),容易产生人为的主观误差,测定数据不甚可靠。因此,目前已广泛采用精确而又快速的PH计电测法测定PH值。随着我国电子技术的发展,国内PH计的新产品不断涌现,’准确度和精密度都有很大的
The seawater PH value is one of the most basic measurement items in the marine survey and is an important factor in the physical and chemical environment of the marine ecosystem. It affects the existing forms of most elements in the seawater and the chemical and biological migration processes. It is of great significance to the applied research and basic theoretical researches in marine biological ecology, marine pollution, marine corrosion and ocean interface exchange. At the same time, it can also serve as an auxiliary indicator for determining the year, origin and movement of the water mass. In the past, the sea water PH value has been used in ancient visual colorimetry. The biggest drawback of visual colorimetry is poor accuracy (about ± 0.05PH), salt error (salinity S = 35 ‰ when the correction value of 0.26PH), prone to subjective human error, the measurement data is not reliable. Therefore, the accurate and fast PH meter electric measurement method has been widely used to measure the PH value. With the development of electronic technology in our country, the new products of domestic PH meter keep appearing, ’accuracy and precision are very big