痕量铂的在线罗丹宁螯合纤维预富集电感耦合等离子体发射光谱法测定研究

Study on Determination of Platinum by Inductively Coupled Plasma Emission Spectrometry with On-line Rhodanine Chelating Fibre Column Preconcentration

中文关键词:  电感耦合等离子体发射光谱  在线富集罗丹宁螯合纤维  铂

英文关键词:Inductively coupled Plasma emission spectrometry  on-line preconcentration  Rhodanine chelating fibre  platinum

中文摘要:

      本文利用罗丹宁螯合纤维作柱材料,研究在线富集电感耦合等离子体发射光谱联用测定痕量铂的分析方法。含Pt的2mol/LHCl溶液流经罗丹宁螯合纤维柱后,所螯合的铂先由含5%硫脲的4mol/LHAc活化,继而被10%HCl(V/V)洗脱。上柱、淋洗及洗脱均由自动在线预富集装置所控制。试验了罗丹宁纤维吸附铂的条件及各种因素包括上柱酸度和流速、洗脱液组成和流速、共存物等的影响。与常规方法比较,8mL上柱体积的富集倍数为6.8倍,检测限降低5倍。

英文摘要:

      An analytical method is described for the determination of trace amounte of platinum by inductively coupled Plasma emission spectrometry (ICP-AEC) with on-line Rhodanine chelating fibre column Preconcentration. Platinum in 2mol/L HCl is retained on Rhodanine chelating tibre column and eluted consecutitvely by 5% thiourea in 4mol/L HAc and 10% HCl at 50℃. All Procedures are controlled by an automated apparatus coupled to ICP-AES. The Optimum conditions for the adsorption of platinum on Rhodahine chelating fibre and the effects of acidity and flow rate of sample solution, composition and flow late of eluent and coexisting substance are investigated. The enrichment factor at 8mL loading volume is 6.8 and the detection limit is decreased five times in comparison with that of conventional method.