Spectroscopy and Spectral Analysis, Volume. 38, Issue 5, 1567(2018)
Analysis of Metal Elements Manganese Using Solution Cathode Glow Discharge-Atomic Emission Spectrometry with Portable Spectrographs
Solution Cathode Glow Discharge-Atomic Emission Spectrometry (SCGD-AES) is a novel rapid, high efficient and real-time online element analysis method, which can be applied to metal elements detection in water. In order to achieve accurate and stable measurement of Mn elements in water, solution cathode glow discharge-atomic emission spectrometry coupled with portable spectrographs (Maya 2000 Pro) were used for the detection of manganese elements in aqueous solution in this paper, and three portable spectrographs with different entrance slit and resolution were employed for the determination. The influence of the entrance slit and resolution of the spectrograph on the spectral detection were studied experimentally, the results showed that the intensity of spectral lines increased when the entrance slit increased. The higher the resolution of the spectrograph was, the higher the ratio of spectral intensity to background intensity was was also concluded. The effects of solution flow rate and discharge current on the emission spectrum of manganese were investigated, and a higher signal background ratio was obtained at a flow rate of 186 mL·min-1 and a current of 65 mA. The spectral detection stability of manganese under optimized experimental conditions with flow rate at 186 mL·min-1 and discharge current at 65 mA was tested, and the relative standard deviations (RSDs) of the three portable spectrographs for measuring the spectral intensity of Mnin a continuous period of time were 059%, 061%, 080% respectively, showing that the stability of detection is good. The analytical performance parameters of manganese were also discussed, and the limit of detection were 428, 651, 338 μg·L-1, respectively. The manganeseelement in the calibration substance was quantitatively analyzed, andthe error range was 002%~208%, the precision ranged from 063%~154% and the recovery rate of samples was 97%~99%, which indicates that the method has high accuracy and stability. The results show that the solution cathode glow discharge-atomic emission spectrometry coupled with portable spectrographis a useful technique for accurately detecting trace manganese elements in aqueous solution.
Get Citation
Copy Citation Text
ZHENG Pei-chao, TANG Peng-fei, WANG Jin-mei, LI Shi-yu. Analysis of Metal Elements Manganese Using Solution Cathode Glow Discharge-Atomic Emission Spectrometry with Portable Spectrographs[J]. Spectroscopy and Spectral Analysis, 2018, 38(5): 1567
Received: Apr. 24, 2017
Accepted: --
Published Online: Jun. 1, 2018
The Author Email: Pei-chao ZHENG (zhengpc@cqupt.edu.cn)