Laser Induced Breakdown Spectroscopy (LIBS) as an analytical tool for the detection of metal ions in aqueous solutions

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Output type: Journal article

Author list: Knopp R., Scherbaum F., Kim J.

Publisher: Springer Verlag (Germany)

Publication year: 1996

Journal: Fresenius' Journal of Analytical Chemistry (0937-0633)

Volume number: 355

Issue number: 1

Start page: 16

End page: 20

Number of pages: 5

ISSN: 0937-0633

eISSN: 1432-1130

URL: http://api.elsevier.com/content/abstract/scopus_id:0030353385

Abstract

Laser induced breakdown spectroscopy (LIBS) is applied to analyze aqueous solutions of Li, Na, Ca, Ba, Pb, Cd, Hg and Er and suspensions of ErBaCuO particles (d = 0.2 μm). An excimer (308 nm) pumped dye laser with laser pulse at 500 nm and pulse energy at 22 ± 2 mJ is used to produce plasma in aqueous solution. Plasma emission lines of the elements are detected by a photodiode array detector. Detection limits of the metal ions are 500 mg/l for Cd, 12.5 mg/l for Pb, 6.8 mg/l for Ba, 0.13 mg/l for Ca, 13 μg/l for Li and 7.5 μg/l for Na. No mercury and erbium emission can be detected, even at Hg and Er concentrations of up to the g/l range. On the other side, for Er in suspensions of ErBaCuO particles a more than 10 times higher sensitivity is found than for dissolved Er. This result gives a possibility to analyze colloid-borne metal ions with an increased sensitivity. © Springer-Verlag 1996.

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