Determination of nitrate and ammonium ions in water samples by atmospheric pressure glow discharge microplasma molecular emission spectrometry coupled with chemical vapour generation

Abstract

In this paper, a low power atmospheric pressure glow discharge (APGD) microplasma source has been investigated for the determination of nitrate and ammonium ions with molecular emission spectrometry (MES) coupled with chemical vapor generation (CVG).

Automatic and Matrix Interference-Free Acid–Base Titration by Coupling CO2 Vapor Generation with Microplasma Carbon Optical Emission Spectrometry

“…The capability of μPD-OES for the determination of nonmetallic analytes (total organic carbon, NH 3 , NO 3 – , NO 2 – , carboxyl group, Cl, Br, and I, etc.) in various samples is well appreciated. ,− ,− However, this is the first attempt to construct an automatic titration system by μPD-OES via the detection of CO 2 . Consequently, an initial experiment was undertaken to verify the feasibility of the proposed system in which μPD-OES was used for realizing titration analysis.…”

Headspace Solid-Phase Microextraction Following Chemical Vapor Generation for Ultrasensitive, Matrix Effect-Free Detection of Nitrite by Microplasma Optical Emission Spectrometry

“…Actually, microplasma molecular emission spectrometry (MES) has been recently used for the determination of nitrate, nitrite, and ammonium via the generation of their corresponding volatile species (such as N 2 and NO) and monitoring their molecular emission. , Due to the generation of N 2 from the reaction between nitrite and cyclamate, initial experiments tended to quantify nitrite via the detection of N 2 molecular emission bands. Standard solutions containing 20 and 50 mg L –1 NO 2 – as well as a blank solution were analyzed by the μPD-MES system, respectively.…”

“…Recently, the application scope of microplasma optical emission spectrometry (MP-OES) has been significantly extended from metal ions (Hg, Cd, As, Pb, etc. ) − to nonmetallic analytes (total organic carbon, NH 3 , NO 3 – , NO 2 – , and carboxyl group) − when chemical vapor generation (CVG) was used as a sample introduction means. Although CVG coupling to MP has been successfully used to determine nitrite via monitoring the molecular emission of NO, the nitrogen contained in discharge gas resulted in a high blank, thus deteriorating the analytical performance. , …”

Direct Ultratrace Detection of Lead in a Single Hair Using Portable Electromagnetic Heating Vaporization-Atmospheric Pressure Glow Discharge-Atomic Emission Spectrometry

“…34 APGD coupled with chemical vapor generation (CVG) technology was applied to the analysis of nitrate and ammonium in environmental water samples with detection limits of 0.24 and 0.20 mg L −1 , respectively. 35 APGD has also been coupled with other different sample introduction methods, including gas chromatography (GC), 36 pneumatic nebulization (PN), 37 ultrasonic nebulization (USN), 38 and membrane desolvation (MD) 39 for various analytical applications. However, the complex components related to the solution injection system and the gas−liquid separator limit the further miniaturization of the whole system.…”

“…Separation and/or preconcentration technologies are usually applied to the fore-end introduction unit of analytical instruments to bring better determination performance, which is also common in APGD-atomic emission spectrometry (AES). ,, Combined with a hydride generation (HG) system, arsenic and antimony were determined with high sensitivity. , In addition, the sensitivity of HG-APGD to the detection of arsenic and antimony can be further improved by the intermittent gas flow (IF) technique . APGD coupled with chemical vapor generation (CVG) technology was applied to the analysis of nitrate and ammonium in environmental water samples with detection limits of 0.24 and 0.20 mg L –1 , respectively . APGD has also been coupled with other different sample introduction methods, including gas chromatography (GC), pneumatic nebulization (PN), ultrasonic nebulization (USN), and membrane desolvation (MD) for various analytical applications.…”