Abstract
An inductively coupled plasma mass spectrometer (ICP-MS) was coupled on-line with an electrothermal vaporisation (ETV). The influence of aerosol gas flow as well as the variation of the coupling distance on the signal intensity was investigated and compared with the results of hydraulic high-pressure nebulizer (HHPN) measurements. Furthermore, temperature programs known from graphite furnace atomic absorption spectroscopy (GFAAS) were applied to ETV-ICP-MS. After optimisation of temperature programs, calibration series based on mono-element and multi-element solutions were carried out. The dynamic range and the detection limits of the method were determined. By use of internal standardisation it was tried to improve linearity and reproducibility. According to the results, internal standardisation does not have a great impact on linearity, but may be a useful tool to improve reproducibility. However, the latter is still low.
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