Evaluation of Matrix Effects in a Pulsed Electrolyte Cathode Atmospheric Pressure Discharge Source for Atomic Emission
- 14 December 2017
- journal article
- research article
- Published by Taylor & Francis Ltd in Analytical Letters
- Vol. 51 (6), 860-869
- https://doi.org/10.1080/00032719.2017.1365266
Abstract
In sample measurements, matrix effects are unavoidable. The matrix effects are one of the main factors affecting the accuracy of the pulsed electrolyte cathode atmospheric pressure discharge detection system. The stability of sodium, potassium, and magnesium, under optimized parameters is measured; the relative standard deviation of spectral intensity is found to be no more than 2%; and the relative standard deviation of background intensity is less than 2%. The matrix effects on the elements potassium, sodium, and magnesium were studied, and the experiments showed that high concentrations of sodium and potassium interfere with each other. A concentration of 200 mg L−1 K+ affected the sodium signal with an enhancement of more than 120%; and the K+ intensity increased 20% in the presence of a high concentration of 200 mL−1 Na+. In high concentrations of sodium or potassium, the elemental signal for magnesium enhancement was approximately 8%. Sodium, potassium, and magnesium were quantitatively determined using a mixed calibration sample. When sodium, potassium, and magnesium are present at low concentrations in solution, there were no obvious matrix effects. The sodium, potassium, and magnesium in the calibration samples are quantitatively determined. The relative error and precision are less than 3%, and the recoveries are less than 105%. The detection limits for sodium, potassium, and magnesium were found to be 2.1, 3.4, and 92.6 µg L−1, respectively.Keywords
This publication has 21 references indexed in Scilit:
- Alternating current driven atmospheric-pressure liquid discharge for the determination of elements with optical emission spectrometryJournal of Analytical Atomic Spectrometry, 2011
- Determination of Elemental Constituents in Different Matrix Materials and Flow Injection Studies by the Electrolyte Cathode Glow Discharge Technique with a New DesignAnalytical Chemistry, 2009
- Spectrochemical Analysis by Using Discharge Devices with Solution ElectrodesAnalytical Chemistry, 2009
- Electrolyte Cathode Atmospheric Glow Discharges for Direct Solution AnalysisApplied Spectroscopy Reviews, 2007
- Use of electrolyte cathode glow discharge (ELCAD) for the analysis of complex mixturesJournal of Analytical Atomic Spectrometry, 2007
- A new, versatile, direct-current helium atmospheric-pressure glow dischargeJournal of Analytical Atomic Spectrometry, 2006
- Spectroscopic and electrical studies of a solution-cathode glow dischargeJournal of Analytical Atomic Spectrometry, 2005
- An atmospheric pressure glow discharge optical emission source for the direct sampling of liquid mediaJournal of Analytical Atomic Spectrometry, 2001
- Direct solution analysis by glow discharge: electrolyte-cathode discharge spectrometryJournal of Analytical Atomic Spectrometry, 1994
- Emission studies on a glow discharge in atmospheric pressure air using water as a cathodeJournal of Physics D: Applied Physics, 1993