Issue 9, 2020

A ceramic microchip with LDA-APGD as the excitation source for OES – a sensitive Hg detecting sensor for microsample analysis

Abstract

A novel portable excitation microsource for optical emission spectrometry (OES) based on atmospheric pressure glow discharge with a liquid drop anode (LDA-APGD), generated in a ceramic microchip (mch), was developed. This excitation microsource uses low temperature cofired ceramic (LTCC) microchips to provide electrical contact and fabricate a hollow to hold a microsample solution. Optimization of this new excitation source was performed for the quantification of Hg in liquid samples and discussed. Optimal parameters for Hg determination were: polarized liquid drop – anode, discharge current – 80 mA, solution drop volume – 15 μL, He flow rate – 300 mL min−1, chip hollow dimensions: diameter 3.0 mm and depth 0.6 mm, HNO3 concentration – 0.10 mol L−1. The addition of low molecular weight organic compounds (LMWOCs) to the solution was also tested. The linearity range for mch-LDA-APGD was up to 30 mg L−1, and the limit of detection (LOD) of Hg was 47 μg L−1. Precision of this method was within 0.65–8.7% (as the relative standard deviation of repeated measurements). Recoveries obtained for tap water samples spiked with Hg(II) ions at 100, 200, and 300 μg L−1 were within the range of 96–122%.

Graphical abstract: A ceramic microchip with LDA-APGD as the excitation source for OES – a sensitive Hg detecting sensor for microsample analysis

Supplementary files

Article information

Article type
Paper
Submitted
16 jan 2020
Accepted
10 mrt 2020
First published
11 mrt 2020

J. Anal. At. Spectrom., 2020,35, 1880-1886

A ceramic microchip with LDA-APGD as the excitation source for OES – a sensitive Hg detecting sensor for microsample analysis

K. Swiderski, T. Matusiak, M. Wozinski, A. Dabrowski, L. Golonka, P. Pohl and P. Jamroz, J. Anal. At. Spectrom., 2020, 35, 1880 DOI: 10.1039/D0JA00011F

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