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| 盐酸胍-MCI-GEL体系固相萃取分离钯的研究 |
| Study on Reversed Phase Extraction for Separation of Palladium by Guanidine Hydrochloride System |
| Received:October 14, 2015 |
| DOI： |
| 中文关键词: MCI-GEL树脂 盐酸胍 固相萃取 钯 富集 |
| 英文关键词: MCI-GEL reversed phase resin guanidine hydrochloride solid -phase extraction palladium enrichment |
| 基金项目:国家自然科学基金(20961012) |
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| 中文摘要: |
| 研究了盐酸胍-MCI-GEL体系固相萃取分离钯的行为。结果表明，在稀盐酸介质中，MCI-GEL树脂能够吸附钯(II)与盐酸胍形成的离子缔合物，最佳吸附条件为:nGCl:nPd(II)=1，盐酸浓度0.05 mol/L，过柱流速5 mL/min，Pd(II)的吸附率可达99%，同时对干扰元素具有较好的选择性，体系的吸附容量为5.2 mg/g；以反方向洗脱的方式，洗脱速度为1 mL/min，3 mL由1%盐酸、20 g/L硫脲配制的洗脱剂可以将0.5 g饱和吸附的树脂上的钯完全洗脱。 |
| 英文摘要: |
| The behavior for separation and enrichment of Pd by MCI-GEL-Guanidine hydrochloride (GCl) system was studied. The results showed that the resulting complex of Pd with guanidine hydrochloride could be adsorbed completely by MCI-GEL resin in diluted hydrochloric acid. The extraction efficiency of Pd could be optimized and increased to 99.0%, when a molar ratio of guanidine hydrochloride to palladium was set at 1 and the concentration of hydrochloric acid was 0.05 mol/L and the flow rate was controlled at 5 mL/min. The other metals had no significant interference in the selective absorption of Pd. The extraction capacity of MCI-GEL resin for Pd was 5.2 mg/g. The elution of palladium from the resin could be achieved with a mixed mixture of 1% hydrochloric acid and 20 g/L thiourea as a eluent at a flow rate of 1 mL/min. 3 mL eluent was required for the complete elution of 0.5 g palladium adsorbed on the saturated resin. |
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