Beam injection flame furnace atomic absorption spectrometry: A new flame method

A new name method of atomic absorption spectrometry is described. The liqui d sample to be analyzed is transported as a high-speed liquid jet into a he ated tube which is positioned in an air/acetylene flame. The jet is generat ed by means of an HPLC pump which feeds a smooth jet nozzle having a diamet er of 50 mu m or smaller. After traveling a distance of 10 cm, the liquid j et enters a small sample introduction hole, impacts onto the opposite inner wall of the tube furnace, and immediately vaporizes (jet impact vaporizati on, JIV). Both the complete introduction. of the entire sample and the exte nded residence time inside the absorption volume result in an improvement i n power of detection from 6- to 202-fold for 17 elements (Ag, As, Au, Bi, C d, Cu, Hg, In, K, Pb, Pd, Rb, Sb, Se, Te, Tl, Zn), A standard deviation of 1.7-4.0% (n = 12;, 50 FL) was achieved. Sample volumes between 10 mu L and 1 mt have been investigated. For 50 mu L sample volumes, the sampling frequ ency is 4/min, The new method can also be considered a simple, effective in terface between HPLC and flame AAS.