van Staden J F, Taljaard R E
Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa.
Talanta. 2004 Dec 15;64(5):1203-12. doi: 10.1016/j.talanta.2004.06.020.
Sequential injection analysis is still dominated by single component analysis. In this proposed robust, economical simple instrumental system seven different metal ions are determined simultaneously using thin-film sequential injection extraction (SIE) with multivariate calibration and multiwavelength detection. Dithizone, in ethanol, is used as extractant and the metal dithizonates' spectra are generated by a diode array spectrophotometer between 300 and 700nm. The SI thin-film extraction using water miscible with ethanol works due to the hydrophobic interaction of ethanol with the Teflon wall to create a thin film. A sample frequency of 27 samples per hour was obtained with a sample carry-over of less than 1%. The results of the proposed sequential injection extraction system compare favourably with the results obtained by using standard atomic absorption spectrometry (AAS) methods on conventional extraction samples.
顺序注射分析仍然以单组分分析为主。在这个提出的稳健、经济且简单的仪器系统中，使用薄膜顺序注射萃取（SIE）结合多变量校准和多波长检测同时测定七种不同的金属离子。在乙醇中的双硫腙用作萃取剂，金属双硫腙盐的光谱由二极管阵列分光光度计在300至700纳米之间生成。与乙醇互溶的水进行的顺序注射薄膜萃取，是由于乙醇与聚四氟乙烯壁的疏水相互作用形成薄膜而起作用的。每小时获得27个样品的进样频率，样品残留率小于1%。所提出的顺序注射萃取系统的结果与在传统萃取样品上使用标准原子吸收光谱法（AAS）获得的结果相比具有优势。
