ANALYSIS OF LIQUID HAZARDOUS WASTE USING THE ENERGO-DISPERZIVE X-RAY FLUORESCENCE SPECTROMETRY

Celap Stefica, Mioc Marija

Abstract

Previously x-ray method was sometimes unable to accurately determine elements at low concentration in complex heterogeneous matrices. Other techniques can successfully use digestion and/or fusion methods to reduce samples to a dilute homogeneous form.
However, when applying these methods of sample preparation to x-rax, detection limits were often unacceptable. The QuickSolve method is a simple but extremely effective manual operation that employs no expensive equipment. It requires a small plastic bottle preloaded with a fixed amount of the Environmental Sample preparation Matrix (ESPM). This ia a totally safe, fine
powder with high adsorption capacity. After adding a fixed mass of sample, manual shaking with stainless steel balls produces a stable principle for the analysis of complex matrices by x-ray, that is, dilution reduces all samples to similar form thus largely eliminating matrix and interelement effects. The first group, acid producing elements, can be present at major concentrations, above one percent and acceptance of shipments may depend on the concentration of this elements. The QuickSolve calibration provides accurate determination of Br, Cl, I, P and S. Preparation of standards is from pure organic and aqueous
solvent. The second group, heavy metals/toxic volatile elements, requires determination of some elements to better than 20 mg kg^-1 .The calibration cover all relevant elements from vanadium to barium. Preparation of standards is from pure aqueous spectroscopic solutions. The analysis time is up to 15 minutes depending on the number of element.

Keywords

x-ray fluorescence spectrometry

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PWC-2003-TC2-024.pdf

DOI

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IMEKO TC

TC2 - Photonics

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