Scientific analysis of salt-making pottery

因为盐可以溶于水，所以人们认为古代陶器中不会有任何盐的痕迹。然而，我们发现了强结合氯(Cl^-)，不溶于水，残留在陶器基质中，并证明了强结合氯(Cl^-)可以被氟离子萃取。该方法已成功应用于古制盐陶器的鉴定。此外，通过对模拟制盐陶器的分析，发现从已知栖息在藻类表面的硅藻中识别海洋甾醇和甾醇，能够区分不同的制盐方法，SOSI-HO(简单地通过加热浓缩海水)和Moshio-HO(在加热之前使用藻类对海水进行预浓缩)。

Because salt is soluble in water, it has being thought that any trace of salt will not remain in ancient pottery. However, we have identified strongly bound chloride (Cl^-), un-dissolved in water, remaining in the pottery matrix, and demonstrated that strongly bound Cl^- can be extracted with fluoride ion. This methodology is successfully applied to identify ancient salt-making pottery. Moreover, from the analysis of simulated salt-making potteries, identification of oceanic sterols and sterols from diatoms known to inhabit on the surface of algae, were found to be capable of distinguishing different salt-making methods, Sosi-ho (simply concentrate seawater by heating) and Moshio-ho (use algae to pre-concentrate seawater prior to heating).