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采用先处理酸碱深性杂质，改进了亚硫酸氢钠提取方法，产率由７０．４提高到７８．９％，将菲醌与亚硫酸氢钠物质的量比由１∶７．０缩小到１∶１．８。为降低成本提供了实验依据。
The first step is to deal with acid-base deep impurities to improve the extraction method of sodium bisulfite, the yield increased from 70.4 to 78.9%, the phenanthrenequinone and sodium bisulfite material ratio reduced from 1: 7.0 To 1: 1.8. Provide experimental basis for reducing costs.