Sensitivity improvement of solution cathode glow discharge-atomic emission spectrometry by using refrigerating anodes for optical determination of metal elements
| Autor: | Chunhong Lai, Jinmei Wang, Yang Yang, Xuefeng Mao, Peichao Zheng, Yuanjiang Luo, Qiang Hu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Detection limit
Glow discharge Range (particle radiation) Materials science 010401 analytical chemistry Analytical chemistry 02 engineering and technology Plasma 021001 nanoscience & nanotechnology 01 natural sciences Cathode 0104 chemical sciences Analytical Chemistry law.invention Anode Metal law visual_art visual_art.visual_art_medium 0210 nano-technology Sensitivity (electronics) Spectroscopy |
| Zdroj: | Journal of Analytical Atomic Spectrometry. 36:1228-1234 |
| ISSN: | 1364-5544 0267-9477 |
| DOI: | 10.1039/d1ja00070e |
| Popis: | In this study, a refrigerating anode method was developed to improve solution cathode glow discharge-atomic emission spectrometry (SCGD-AES) for the determination of elements. Spectral characteristics of metal anodes at different temperatures were studied in the range from 10 to 30 °C. The spectral signals of metals were enhanced by reducing the metal anode temperature during the plasma discharge. Moreover, the method of the refrigerating anode improved the stability of spectral emission of metal elements. Compared with the unrefrigerated system under the same experimental conditions, the detection limits of Ag, Cd, Cu, Mn and Zn were 0.6, 9.1, 5.3, 8.7 and 16 μg L−1, respectively, which represented the improvements by 6.5, 3.5, 3.2, 3.9 and 3.1 times, respectively. The measurement results of Ag, Cd, Cu, Mn and Zn in a certified reference solution (BWB2446-2016) and an actual water sample from the Yangtze river by SCGD-AES with the refrigerating anode were in agreement with the reference values measured by ICP-OES. The water sample recovery from the Yangtze river ranged from 101.5 to 110.0%, suggesting that the measurement results exhibited high accuracy and reliability. All the results indicated that SCGD-AES coupled with a refrigerating anode could improve its analytical ability and provide an analytical method for in situ, real-time and on-line determination of metal elements in water samples. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|