In this paper, a novel micro drop solvent extraction technique jonied with low temperature ETV-ICP-AES for ultra trace element analysis is reported. The apparatus of micro drop solvent extraction was designed, and pre...In this paper, a novel micro drop solvent extraction technique jonied with low temperature ETV-ICP-AES for ultra trace element analysis is reported. The apparatus of micro drop solvent extraction was designed, and preliminary investigation was made for the extraction of ultra trace La by a micro drop of 0.05 mol/L PMBP-benzene(2 μL). It was found that 500-fold concentration of ultra-trace La in 1 mL solution was achieved in 0.2 mL of glass chamber by a single micro drop of PMBP-benzene suspended on the tip of a 10 μL of microsyringe. The future development of micro drop solvent extraction technique in atomic spectrometry was briefly discussed.展开更多
The vaporization and transport modes of Be and Cr(Ⅲ) from the graphite tube were studied by using the low temperature vaporization technique combined with ICP-AES. The main factors of influencing the formation of Be ...The vaporization and transport modes of Be and Cr(Ⅲ) from the graphite tube were studied by using the low temperature vaporization technique combined with ICP-AES. The main factors of influencing the formation of Be and Cr(Ⅲ) acetylacetonates were investigated. It was found that the Be and {Cr(Ⅲ)} acetylacetonates were able to vaporize and introduce quantitatively into ICP with good thermal stability and volatility. The chelation reaction between the analyte and acetylacetone should be completed before the sample introduction to avoid the formation of refractory carbide and to eliminate the memory effect.展开更多
文摘In this paper, a novel micro drop solvent extraction technique jonied with low temperature ETV-ICP-AES for ultra trace element analysis is reported. The apparatus of micro drop solvent extraction was designed, and preliminary investigation was made for the extraction of ultra trace La by a micro drop of 0.05 mol/L PMBP-benzene(2 μL). It was found that 500-fold concentration of ultra-trace La in 1 mL solution was achieved in 0.2 mL of glass chamber by a single micro drop of PMBP-benzene suspended on the tip of a 10 μL of microsyringe. The future development of micro drop solvent extraction technique in atomic spectrometry was briefly discussed.
文摘The vaporization and transport modes of Be and Cr(Ⅲ) from the graphite tube were studied by using the low temperature vaporization technique combined with ICP-AES. The main factors of influencing the formation of Be and Cr(Ⅲ) acetylacetonates were investigated. It was found that the Be and {Cr(Ⅲ)} acetylacetonates were able to vaporize and introduce quantitatively into ICP with good thermal stability and volatility. The chelation reaction between the analyte and acetylacetone should be completed before the sample introduction to avoid the formation of refractory carbide and to eliminate the memory effect.
