地質知識1957年第5期登載了鄭振东同志『薄膜反应后分离錫石的方法』的文章,提出錫砂在鋅片上进行薄膜反应后傾入磁蒸发皿上加热处理,鍚砂就会漂浮膠結在一块,然后撥出洗淨称重量。这种方法可以大大节省逐粒挑选錫砂的时間,对重砂分析工作有很大的帮助,但我們經过試驗,觉得这种方法还有改进的必要。 Geological knowledge No. 5 of 1957, published in Comrade Zheng Zhendong “separation of cassiterite after thin film reaction method” article, proposed tin sand in the zinc film after the reaction into the magnetic evaporating dish on the heat treatment, the sand will be floating cement In a piece, and then set aside to wash weighing. This method can greatly save the time of sorting tin sand by grain, and it is very helpful to the analysis of heavy sand. However, after testing, we think this method is still necessary for improvement.