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测定硫酸盐法制浆蒸煮液、黑液中的S~(2-)、Sx~(2-)含量,对于选择合理的蒸煮条件,减少造纸蒸煮黑液对环境的污染,都有重要意义。国外Swartz和Lenz等研究了使用Ag/Ag_2S电极和镉电极测定硫酸盐法制浆黑液中S~(2-)的一些方法,但这些方法都有某些不足之处,难以在工厂推广。如: 在SAOB中用标准曲线法、S~(2-)标准加入法和Ag~+标准加入法测定时,试样中S~(2-)的
Determination of S 2 -, Sx 2 - in the kraft cooking liquor and black liquor of kraft pulping is of great significance for choosing reasonable cooking conditions and reducing pollution of papermaking black liquor to the environment. Some foreign methods such as Swartz and Lenz used Ag / Ag_2S electrode and cadmium electrode to determine S 2- in Kraft pulping black liquor, but these methods all have some shortcomings and are difficult to be popularized in the factory. Such as: SAOB in the standard curve method, S ~ (2-) standard addition method and Ag ~ + standard addition method determination, the sample S ~ (2-)