Determination of Micro Impurity Element Potassium in Sodium Metavanadate by ICP-OES

DOI

10.2991/icmsa-15.2015.105How to use a DOI?

Keywords

Inductively Coupled Plasma Atomic Emission Spectrometry, ICP-OES, Sodium Metavanadate, Potassium, Microanalysis, Matrix Effects.

Abstract

The sodium metavanadate samples are digested completely by hydrochloric acid and nitric acid (VHCl: VHNO3=5:1), and then made a directly determination of micro element potassium of 0.010 to 1.0% by inductively coupled plasma atomic emission spectrometry (ICP-OES). In the coexistence medium of 42% vanadium and 20% sodium, the method systematically investigated the matrix effects, spectral interferences, background effects and other interference factors, and a concluded was made: the matrix elements vanadium and sodium do not produce spectral interference in the determination of micro potassium, the matrix effect of vanadium and background noise enhanced the detection signal of potassium spectral lines, however, the matrix effects of sodium weakened the signal of potassium. In the high concentrations of vanadium and sodium coexistence medium system, the overall matrix effect still raised up the detection signal of potassium analysis lines and the background noise. Therefore, the test have taken the preferred analysis spectral lines, background correction region and ICP spectrometer parameters and other testing measures, and through comprehensive application of the matrix matching and synchronization background correction methods to eliminate interference in determination of the micro potassium that caused by the high content of vanadium and sodium coexist matrix. The results show: Detection limit is 480 g/L (766.490nm) or 480 g/L (769.896nm); Background equivalent concentration is 200 g/L (766.490nm) or 210 g/ L (769.896nm); RSD 2.72% (766.490nm) or RSD 3.60% (769.896nm); Recovery rate is between 95.0% and 107.5%.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Yong Cheng
PY  - 2014/06
DA  - 2014/06
TI  - Determination of Micro Impurity Element Potassium in Sodium Metavanadate by ICP-OES
BT  - Proceedings of the 2015 International Conference on Material Science and Applications
PB  - Atlantis Press
SP  - 576
EP  - 580
SN  - 2352-541X
UR  - https://doi.org/10.2991/icmsa-15.2015.105
DO  - 10.2991/icmsa-15.2015.105
ID  - Cheng2014/06
ER  -