本世纪六十年代初,Cox等人对1902年确立的Knudsen测盐法提出异议。很多学者围绕海水盐度问题,又展开了多方面的研究。1978年实用盐标的制定,正是这一系列活动的总结。不论早年Knudsen制备的原始标准海水,还是后来公认的纯银标准,在盐 In the early 1960s, Cox et al. Challenged the Knudsen salt determination method established in 1902. Many scholars focus on sea salinity, but also started a wide range of research. The formulation of a practical salt standard in 1978 is exactly the conclusion of this series of activities. Regardless of the original standard seawater prepared by Knudsen in the early years, or the sterling silver standard later accepted,