摘要
将环氧氯丙烷与壳聚糖进行交联反应制备了不溶于酸、碱的交联壳聚糖（CCTS），研究了不同pH条件下CCTS对于Pd（Ⅱ）的吸附特性，结果表明：在pH1～4时，吸附20min，CCTS对Pd（Ⅱ）的吸附率达98％以上；考察了吸附时间、试样体积、CCTS用量、共存元素等对CCTS吸附Pd（Ⅱ）的影响、吸附容量以及Pd（Ⅱ）的脱附；探讨了吸附机理；建立了CCTS预富集分离，石墨炉原子吸收光谱（GFAAS）测定痕量钯的新方法。该法检出限（3σ，n=8）为0．143μg·L，相对标准偏差（RSD）小于5．47％，用于湖水和海水中痕量钯的检测，回收率在92％～96％之间。该法还可用于钯的回收利用。
A novel crosslinked chitosan（CCTS） not dissolved in acidic or alkaline solutions was synthesized by the crosslinking reaction of chitosan （CTS） with crosslinking agent （3-chloro-1,2-epoxypropane）, The adsorption capability of Pd（ Ⅱ ） by CCTS was studied at different pH value, The results showed that the adsorption efficiency was above 98% after preconcentration for 20 minutes when pH values were 1-4, The effects of preconcentration time, dosage of CCTS, adsorption capacity of CCTS, sample volume, coexistent elements, and elution of Pd（Ⅱ） were investigated, The mechanism of adsorption of CCTS for Pd（Ⅱ） was discussed. A novel method for the preconcentration and separation of trace Pd（Ⅱ） with crosslinked chitosan（CCTS） and its determination in water by graphite furnace atomic absorption spectrometry has been developed. The detection limit（3σ, n=8） was 0, 143 μg·L^-1, the relative standard deviation（RSD） was less than 5.47%, and this preconcentration method was used to detect Pd（ Ⅱ ） in lake water and sea water with recoveries of 92%-96%, It also can be used to recycle Pd（Ⅱ）.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2007年第3期592-594,共3页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(20277028)
湖北省自然科学基金项目(2002AB059)资助
