High solids sample introduction for flame atomic absorption analysis

Abstract

Studies are presented describing direct, clog-free productlon of hlgh density flnely dlspersed aerosols from highly complex samples through use of a speclai nebulizer design based on principles first developed by R. S. Babington. Appllcatlon of thls technlque to sample lntroductlon for atomic absorption spectrometry is described for matrices of combined hlgh suspended solids content, Increased vlscoslty, and elevated salt concentration. Cu and Zn are determined In whole blood, urine, seawater, evaporated milk concentrate, and tomato sauce with mlnimal sample preparation.

Evaluation of a microconcentric nebuliser–cyclonic spray chamber for flow injection simultaneous multielement inductively coupled plasma optical emission spectrometry

“…The most common sample introduction method is pneumatic nebulisation of the However, at carrier flow rates above 1.0 ml min−1, the analyte transport efficiency of concentric nebulisers falls well below sample solution as a fine aerosol employing a concentric nebuliser and a Scott-type double pass spray chamber.1,2 2%.10,13,14,27 The poor analyte transport efficiency of such nebulisers is a further drawback for dispersive sample delivery Alternative nebulisation techniques use cross-flow3,4 and Babington nebulisers. 5,6 The type of nebuliser used for a systems such as FI because the analyte signal is further reduced, and therefore low sensitivity and high detection limits are particular analysis also depends on the sample solution characteristics such as viscosity, surface tension and total dissolved observed compared with continuous sample introduction methods. solid content.…”

Glass frit nebulizer for atomic spectrometry

“…Popular pneumatic nebulizers, both cross-flow and concentric, suffer from short-term noise, long-term drift, and sample transport inefficiency. Erratic performance due to nebulizer clogging frequently results when aspirating samples which contain either a high dissolved salt content or suspended particulates (1). A wide range of droplet sizes is produced by these nebulizers.…”

Analysis of High Solid Content in Biological Samples by Flame Atomic Absorption Spectrometry

“…The analysis by FAAS of solid samples or high solid content samples, as could be crude clinical samples is not frequently found in the literature. It is reported the use of slurries from crude tissues combining the FAAS technique with nebulization with a Babington type nebulizer for the introduction of high solids content samples (Mohamed and Fry, 1981;Fry and Denton, 1977). Brandao et al, 2011 reported a simple and fast procedure for the sequential multi-element determination of Ca and Mg in dairy products employing slurry sampling and high resolution-continuum source flame atomic absorption spectrometry (HR-CS FAAS).…”