Microanalysis of arsenic in solid samples by laser ablation-atomic fluorescence spectrometry. Issue 2 (1st December 2016)

• Record Type: Journal Article
• Authors: Šlejkovec, Zdenka; van Elteren, Johannes T.; Šelih, Vid S.; Šala, Martin; Corns, Warren T.
• Is Part Of: Journal of analytical atomic spectrometry. Volume 32:Issue 2(2017)
• Page Start: 299
• Page End: 304
• Publication Date: 2016-12-01
• Subjects: Atomic spectra -- Periodicals; Atomic absorption spectroscopy -- Periodicals; 543.0858
• DOI: 10.1039/c6ja00344c
• Languages: English
• ISSNs: 0267-9477

Abstract

Abstract : A spot mode-LA-AFS method has been developed for localised microanalysis of arsenic in biological tissues. Abstract : A spot mode-LA-AFS method has been developed for localised microanalysis of arsenic in biological tissues. The cool argon–hydrogen–air diffusion flame in the detector is able to effectively decompose LA-generated aerosol particles and atomise arsenic for fluorescence detection. After optimisation of the critical LA-AFS parameters through ablation of standards based on cellulose-based filters loaded with various arsenic species, the method was validated by comparison with LA-ICP-MS through measurement of arsenic in the leaflets of the arsenic-hyperaccumulating Chinese ladder brake fern Pteris vittata L. Both methods yielded very similar arsenic concentrations associated with parts of the leaflets. The performance characteristics of the LA-AFS method were as follows: sensitivity, 0.01 mV μg −1 g; detection limit (3× standard deviation of the noise), 11 μg g −1, or, in absolute terms, 30 pg of ablated arsenic; analysis time, ca. 1 min per spot; linearity, 0–40 mg g −1 .