Simultaneously determination of multi metal elements in water samples by liquid cathode glow discharge-atomic emission spectrometry

High-Sensitivity Determination of K, Ca, Na, and Mg in Salt Mines Samples by Atomic Emission Spectrometry with a Miniaturized Liquid Cathode Glow Discharge

“…In addition, a series of O II lines are distributed from 410.0 to 470.1 nm, which are produced from water vapor by electron impact. Moreover, the atomic lines of H α and H β are at 656.3 and 486.1 nm, which come from the electrolyte around the cathode that is bombarded by the high energy electrons [ 30 , 31 ]. Spectral lines of Na I also appear at 589.0 and 589.6 nm, which suggests that the blank sample still contains a small amount of impurities.…”

“…The schematic diagram of the experimental device for miniaturized LCGD-AES is similar to our previous work [ 30 , 31 ] and is presented in Figure 1 . It contains a DC high voltage power supply, sample introduction, glow discharge system, and spectral detection.…”

“…Recently, based on the principle of ELCAD, we also successfully developed a novel liquid cathode glow discharge-atomic emission spectrometry (LCGD-AES) for the simultaneous determination of multimetal elements in water samples [ 30 ] and ores samples [ 31 ], in which the glow discharge is sustained between a needle-like Pt anode and the electrolyte (as cathode) overflowing from a quartz capillary. Compared with conventional ELCAD, the LCGD has several advantages.…”

“…In addition, the insertion of the quartz capillary into the graphite tube excludes the reservoir of ELCAD. Moreover, several knots in peristaltic pump tubing can increase the stability of discharge plasma [ 30 , 31 ].…”

Recent Advances and Perspective on Design and Synthesis of Electrode Materials for Electrochemical Sensing of Heavy Metals

“…While fast response, high sensitivity, and wide sensing spectrum are the generally required parameters for sensing, ease of operation with low cost is also highly demanded. Conventional benchtop techniques such as inductively coupled plasma optical emission spectrometry (ICP‐OES), UV–Vis spectrometry, atomic absorption/emission spectroscopy, and laser‐induced breakdown spectroscopy (LIBS) are generally located in high‐level laboratories with professional personnel, which are not suitable for fast, inexpensive, and in situ measurements without tedious sample preparation. The growing demand for real‐time on‐site monitoring of water quality for human health and the environment requires a competitively sensitive and reliable method with low cost and less environmental pressure.…”