Berndt H, Schaldach G, Kägler S H
Institut für Spektrochemie und angewandte Spektroskopie, Bunsen-Kirchhoff-Strasse 11, D-44139, Dortmund, Germany.
Anal Bioanal Chem. 1996 Apr;355(1):37-42. doi: 10.1007/s0021663550037.
In hydraulic high-pressure nebulization (HHPN) an aerosol is produced by means of an HPLC-pump and a special nebulization nozzle, applying a pressure of about 200 bar. This spray technique has been employed for sample introduction of mineral oil samples in flame atomic absorption/flame emission spectrometry. The determination of the trace elements Al, Cr, Cu, Fe, K, Na, Ni, Pb, Si and V has been investigated. Viscosity hardly acts upon the sensitivity of the determination, thereby avoiding a time consuming dilution of oil samples. By means of two interconnecting sampling valves a calibration method based on the standard addition technique can be performed which is both simple and easy to carry out. In samples of used oils, results for Cu and Pb equalled those of XRF-analysis. Regarding Fe traces, data obtained from AAS and XRF measurement correlate. In comparison with sample uptake by pneumatic nebulization, which is restricted to diluted oil samples, detection limits decrease by a factor of 2 to 4, indicating the dilution required in pneumatic nebulization.
在液压高压雾化（HHPN）中，通过高效液相色谱泵和特殊的雾化喷嘴产生气溶胶，施加约200巴的压力。这种喷雾技术已用于火焰原子吸收/火焰发射光谱法中矿物油样品的进样。研究了微量元素铝、铬、铜、铁、钾、钠、镍、铅、硅和钒的测定。粘度对测定灵敏度几乎没有影响，从而避免了耗时的油样稀释。通过两个相互连接的采样阀，可以执行基于标准加入技术的校准方法，该方法既简单又易于实施。在废油样品中，铜和铅的结果与X射线荧光分析的结果相当。关于铁痕量，从原子吸收光谱法和X射线荧光测量获得的数据相关。与仅限于稀释油样的气动雾化进样相比，检测限降低了2至4倍，这表明气动雾化需要进行稀释。
