Publication detail

Optimization of microwave-assisted extraction for fly ash elemental composition determination by oa-TOF-ICP-MS

Authors: Šídová Tereza | Husáková Lenka | Urbanová Iva

Year: 2016

Type of publication: ostatní - článek ve sborníku

Name of source: European Symposium on Atomic Spectrometry ESAS 2016 : book of abstracts

Publisher name: Hungarian Chemical Society

Place: Budapest

Page from-to: 149

Titles:

Language	Name	Abstract	Keywords
eng	Optimization of microwave-assisted extraction for fly ash elemental composition determination by oa-TOF-ICP-MS	In this work a novel, simple, efficient and environmentally friendly a microwave-assisted extraction (MAE) method using ammonium fluoride as the extractant prior to multi-elemental analysis of fly ash samples by inductively coupled plasma orthogonal acceleration time-of-flight mass spectrometry (oaTOF-ICP-MS) was developed. This method avoids handling the corrosive and/or toxic acids like HF, HCl or HClO4 being commonly used during sample preparation of the fly ash samples. Thus, it prevents the potential risk of analyte loss due to the creation of volatile fluorides and eliminates the formation of different polyatomic species interfering the determination of number of elements during the oaTOF-ICP-MS analysis. The optimum extraction parameters evaluated using a fractional factorial design were as follows: 10 mg of the sample extracted with 5 mL of 140 g L-1 NH4F for 10 min at 200 °C. The optimized MAE procedure was successfully applied to the determination of 11 elements (Li, Be, Ni, As, Se, Rb, Sb, Cs, W, Tl and U) in two certified reference materials, namely Fine Fly Ash CTA-FFA-1 and Constituent Elements in Coal Fly Ash Standard Reference Material® 1633b. The obtained results were in a good agreement with the certified or comparative values with an overall precision better than 10% in all cases.

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