Simultaneously determination of multi metal elements in water samples by liquid cathode glow discharge-atomic emission spectrometry
Autor: | Xing Wang, Xiaomei Zhang, Jie Yu, Shuxiu Yang, Duixiong Sun, Quanfang Lu, Jidong Zheng |
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Rok vydání: | 2016 |
Předmět: |
Glow discharge
Chemistry Supporting electrolyte 010401 analytical chemistry Analytical chemistry 02 engineering and technology Electrolyte 021001 nanoscience & nanotechnology 01 natural sciences Cathode 0104 chemical sciences Analytical Chemistry law.invention Anode Mineral water Tap water law Water quality 0210 nano-technology Spectroscopy |
Zdroj: | Microchemical Journal. 128:325-330 |
ISSN: | 0026-265X |
DOI: | 10.1016/j.microc.2016.05.019 |
Popis: | In this work, a liquid cathode glow discharge-atomic emission spectrometry (LCGD-AES) was constructed for simultaneously determination of K, Na, Ca, Mg and Zn in water samples (tap water, mineral water, Yellow River water and waste water), in which the glow discharge plasma was produced between the needle-like Pt anode and electrolyte around a quartz capillary cathode. The effects of the supporting electrolyte, discharge voltage and organic additives on emission intensity were investigated in detail. The limits of detections (LODs) of metals were compared with those measured by the closed-type electrolyte-cathode discharge-atomic emission spectrometry (ELCAD-AES). In addition, the measured results of water samples using LCGD were verified by ICP. The results showed that the optimal operation conditions are pH = 1 HNO3 as supporting electrolyte, addition of 0.15% formic acid and 650 V discharge voltage. The R2 and the RSD are ranged from 0.9887 to 0.9990 and 1.10% to 2.19%, respectively. LODs of K, Na, Ca, Mg and Zn are 0.02, 0.04, 0.19, 0.04 and 0.05 mg L− 1, which are in agreement with the ELCAD-AES, and satisfied the recommended levels of the China standards for drinking water quality. The obtained results of Na, K, Ca, Mg and Zn in water samples by LCGD and ICP have certain difference. This result provides an alternative analytical method for the determination of metal elements in water samples. |
Databáze: | OpenAIRE |
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