Abstract

Samples can be found in solid, liquid, or gaseous form. While one might argue that solids are the most ubiquitous type of sample analyzed, it would be difficult to defend the convenience of handling liquids. Indeed, most of our analytical instrumentation, from the electro-chemical through chromatographic to the spectroscopic, requires samples in liquid form. After a decade of effort in our laboratory developing solid-sample introduction methods for inductively coupled plasma emission and mass spectrometry, we have come to appreciate the convenience of liquid samples. As we approached parts per billion detection limits in solid samples using electro-thermal vaporization, we encountered inhomogeneity problems in our solid samples and standards. When tackling difficult

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