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分别采用两种不同的方法，制得两种水溶性含硫纤维素衍生物ＣＭＣＳＨ和ＣＭＣＳ。ＣＭＣＳＨ仅能溶于ｐＨ＞１１的碱性溶液中，水溶性较差是由于在反应中发生分子间交联所致。而ＣＭＣＳ的水溶性很好。衍生物的红外和紫外光谱均表明，衍生物中带有含硫功能团。ＣＭＳＨ中的含硫基团主要是以巯基（ＳＨ）形式存在；而在ＣＭＣＳ中含硫基团主要是以硫醚结构形式存在。两种衍生物均可用元素分析法测定其含硫量，但对于ＣＭＣＳＨ，还可用碘量法测定其ＳＨ含量。衍生物在室温下，具有很好的储存稳定性，但在较高温度和碱性条件下，易发生酯基水解，造成含硫功能团减少。两种衍生物对金离子均有絮凝回收作用，对于１０ｍＬ１０μｇＡｕ／ｍＬ的金液，衍生物用量在０．０１５ｇ以上时，对金回收率可达９５％以上。
Two different methods were used to prepare two water-soluble sulfur-containing cellulose derivatives CMCSH and CMCS. CMCSH can only dissolve in alkaline solution of pH> 11, poor water solubility is due to the intermolecular cross-linking occurred in the reaction. The CMCS water-soluble well. The infrared and UV spectra of the derivatives all show that the derivatives have sulfur-containing functional groups. The sulfur-containing groups in CMSH mainly exist in the form of mercapto (SH). In CMCS, the sulfur-containing groups are mainly in the form of thioether. Both derivatives can be determined by elemental analysis of sulfur content, but for the CMCSH, iodine method can also be used to determine the SH content. Derivatives have good storage stability at room temperature, but ester hydrolysis is prone to occur at higher temperatures and under alkaline conditions, resulting in a reduction of sulfur-containing functional groups. Both derivatives have the effect of flocculation recovery of gold ions. When the amount of derivative is above 0.015g for 10mL10μgAu / mL gold solution, the gold recovery rate can reach more than 95%.