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研究了一种新型溶于水、酸、碱的交联壳聚糖在汞形态分析中的应用。以ＥＤＴＡ为络合剂，交联壳聚糖能选择性富集分离无机汞；以ＫＩ作为络合剂，交联壳聚糖同时富集甲基汞、乙基汞和苯基汞，０．４ ｍｏｌ／Ｌ ＮａＯＨ可定量洗脱苯基汞，１．０ ｍｏｌ／Ｌ ＮａＯＨ定量洗脱烷基汞（甲基汞和乙基汞），洗脱下来的有机汞用 Ｋ２Ｃｒ２Ｏ７／ＣｄＣｌ２氧化，ＫＢＨ４还原，冷原子吸收光谱法测定。方法富集倍数达１００倍，用于分析实际水样，对无机汞、苯基汞及烷基汞的检测限（３σ）分别为 ７． ８ ｎｇ／Ｌ、９． ８ ｎｇ／Ｌ、１２ ｎｇ／Ｌ，回收率分别在 ９４％～９８％之间，对 ５０ ｎｇ／Ｌ的上述汞形态进行测定，相对标准偏差均小于８．０％（ｎ＝１１）。
The application of a new type of cross-linked chitosan dissolved in water, acid and alkali to the analysis of mercury speciation was studied. With EDTA as the complexing agent, the cross-linked chitosan can selectively enrich and separate the inorganic mercury. Crosslinking chitosan can simultaneously enrich methylmercury, ethylmercury and phenylmercury with KI as a complexing agent. 4 mol / L NaOH can quantitatively elute phenylmercury, and 1.0 mol / L NaOH quantitatively elute alkylmercury (methylmercury and ethylmercury). The organic mercury eluted is oxidized with K2Cr2O7 / CdCl2, KBH4 reduced , Cold atomic absorption spectrometry. The method of enrichment multiple of 100 times for the analysis of actual water samples, the detection limits (3σ) of inorganic mercury, phenylmercury and alkylmercury were 7. 8 ng / L, 9. The relative standard deviations (RSDs) were less than 8.0% (n = 11). The recoveries were between 8% and 8 ng / L, and the recoveries were between 94% and 98%.