Development of a New Kilowatt Microwave Plasma Torch(kW-MPT) Excitation Source for Atomic Emission Spectrometry†

doi:10.7503/cjcu20150598

Abstract

Abstract:

Based on the simulation of transmission and distribution characteristics of the electromagnetic field inmicrowave plasma torch(MPT) torches with different configurations using electromagnetic simulation software and experimental study, a new MPT torch with double resonant configuration was, for the first time, developed. The results show that the inner tube of MPT torch plays an important role in strengthening the electric field intensity at the open end of the MPT torch and redistributing the electromagnetic field in the whole torch by the formation of the double resonance. It contributes also to enhance the macroscopic stability and the self-sustaining of the plasma. The stability of the plasma was shown to be excellent when the spacer between inner and intermediate tubes is located about 20—30 mm from the top opening of the torch. Preliminary study showed that the analytical performance for 13 common elements was approaching that of traditional ICP-AES.

Key words: Kilowatt microwave plasma torch, Double resonant configuration, Atomic emission spectrometry

CLC Number:

O657.31

TrendMD:

JIN Wei, YU Bingwen, ZHU Dan, YING Yangwei, YU Haixiang, JIN Qinhan. Development of a New Kilowatt Microwave Plasma Torch(kW-MPT) Excitation Source for Atomic Emission Spectrometry^†[J]. Chem. J. Chinese Universities, 2015, 36(11): 2157.

Figures/Tables 4

References 10

[1]	Jin Q.H., Yang G. D., Yu A. M., Liu J., Zhang H. Q., Ben Y. Z.,Acta Scientiarum Naturalium Universitatis Jilinensis, 1985, (1), 90—92
	(金钦汉, 杨广德, 于爱民, 刘军, 张寒琦, 贲跃之. 吉林大学自然科学学报, 1985, (1), 90—92)
[2]	Jin Q. H., Wang F. D., Hieftje G. M., Chem. J. Chinese Universities, 1990, 11(12), 1353—1356
	(金钦汉, 王芬蒂, Hieftje G. M. 高等学校化学学报, 1990, 11(12), 1353—1356)
[3]	Pack B. W., Broerkaert J. A. C., Gurowaski J. P., Poehlman J., Hieftje G. M., Anal. Chem., 1998, 70(18), 3957—3963
[4]	Jin Q. H., Duan Y. X., Olivares J. A., Spectrochim. Acta, 1997, 52(2), 131—161
[5]	Yang W. J., Zhang H. Q., Yu A. M., Jin Q. H., Microchem. J., 2000, 66, 147—170
[6]	Jankowski K.J., Reszke E., Microwave Induced Plasma Analytical Spectrometry, The Royal Society of Chemistry, Cambridge, 2011, 4
[7]	Jin Q.H., Mao H., Hieftje G. M., Microwave Plasmas in Analytical Chemistry, Jilin University Press, Changchun, 1993, 2
	(金钦汉, 黄矛, Hieftje G.M. 微波等离子体原子光谱分析, 长春: 吉林大学出版社, 1993, 2)
[8]	Hammer M. R., Spectrochim. Acta, 2008, 63(4), 456—464
[9]	van der Mullen J. J. A. M., van de Sande M. J., de Vries N., Brokes B., Iordanova E., Gamero A., Torres J., Sola A., Spectrochim. Acta, 2007, 62(10), 1135—1146
[10]	Jankowski K., Ramsza A., Reszke E., Method and System for Heating of Plasma, Pol. Pat. Appl., PL20080385484, 2008-06-20

Element	Spectral line/nm	Detection limit/(μg·L^-1)		Element	Spectral line/nm	Detection limit/(μg·L^-1)
Element	Spectral line/nm	MPT	ICP	Element	Spectral line/nm	MPT	ICP
Ag	Ⅰ 328.068	3.7	1 (Ⅰ 328.068)	Cu	Ⅰ 327.396	4.1	0.4 (Ⅱ 224.700)
Al	Ⅱ 396.152	8.7	3 (Ⅰ 308.215)	Li	Ⅰ 670.784	0.2	0.3 (Ⅰ 610.362)
Pd	Ⅰ 363.470	8.9	3 (Ⅰ 340.458)	Na	Ⅰ 588.995	0.8	3 (Ⅰ 818.326)
Be	Ⅰ 234.861	1.1	0.1 (Ⅰ 214.438)	Pb	Ⅰ 405.783	61.0	10 (Ⅱ 220.353)
Ca	Ⅱ 393.366	0.34	0.02 (Ⅱ 315.887)	Ga	Ⅰ 417.206	2.8	4(Ⅰ 287.424)
Cr	Ⅰ 425.435	6.5	2 (Ⅱ 267.716)	In	Ⅰ 410.176	13.6	9(Ⅱ 230.606)

Element	Spectral line/nm	Detection limit/(μg·L^-1)		Element	Spectral line/nm	Detection limit/(μg·L^-1)
Element	Spectral line/nm	MPT	ICP	Element	Spectral line/nm	MPT	ICP
Ag	Ⅰ 328.068	3.7	1 (Ⅰ 328.068)	Cu	Ⅰ 327.396	4.1	0.4 (Ⅱ 224.700)
Al	Ⅱ 396.152	8.7	3 (Ⅰ 308.215)	Li	Ⅰ 670.784	0.2	0.3 (Ⅰ 610.362)
Pd	Ⅰ 363.470	8.9	3 (Ⅰ 340.458)	Na	Ⅰ 588.995	0.8	3 (Ⅰ 818.326)
Be	Ⅰ 234.861	1.1	0.1 (Ⅰ 214.438)	Pb	Ⅰ 405.783	61.0	10 (Ⅱ 220.353)
Ca	Ⅱ 393.366	0.34	0.02 (Ⅱ 315.887)	Ga	Ⅰ 417.206	2.8	4(Ⅰ 287.424)
Cr	Ⅰ 425.435	6.5	2 (Ⅱ 267.716)	In	Ⅰ 410.176	13.6	9(Ⅱ 230.606)

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[2]	YU Bingwen,JIN Wei,JIN Qinhan,LIU Xu. Derivation and Application of Signal-to-background-to-concentration Ratio for Atomic Emission Spectrometry^† [J]. Chem. J. Chinese Universities, 2019, 40(5): 880.
[3]	ZHANG Jin-Sheng, LI Li-Hua, ZHANG Jin-Ping, JIN Qin-Han. Determination of Trace Lead in Unleaded Gasoline by Microwave Digestion-Microwave Plasma Torch Atomic Emission Spectrometry [J]. Chem. J. Chinese Universities, 2004, 25(7): 1248.
[4]	ZHOU Jian-Guang, PENG Zeng-Hui, HUAN Yan-Fu, YU Ai-Min, JIN Qin-Han, ZHOU Xiang, LIU Mei . An Investigation on Effect of Desolvation System on Analytical Performance of MPT-AES [J]. Chem. J. Chinese Universities, 2002, 23(7): 1273.
[5]	ZHAO Li-Wei, FU Yao, SONG Da-Qian, ZHANG Han-Qi, JIN Qin-Han . A Study of the Coupling Position of the Microwave Plasma Torch [J]. Chem. J. Chinese Universities, 2001, 22(2): 201.
[6]	XIONG Hong-Chun, HU Bin, JIANG Zu-Cheng . A Miniaturization Solid-phase Extraction Technique Designed for Electrothermal Vaporization-Atomic Emission Spectrometry Determination [J]. Chem. J. Chinese Universities, 2000, 21(7): 1035.
[7]	XIONG Hong-Chun, HU Bin, HUANG Wei-Hong, PENG Tian-You, CHEN Shi-Zhong, JIANG Zu-Cheng . Determination of Trace Amounts of Rare Earth Elements by ETV-ICP-AES Combined with Microcolumn Separation/Preconcentration [J]. Chem. J. Chinese Universities, 2000, 21(11): 1647.
[8]	LIU Si-Dong, GUO Li-Ping, ZHANG Zhuo-Yong, CHEN Hang-Ting, ZENG Xian-Jin . Factor Analysis Used to Peak Position Optimization and SpectraLINterference Correction in Inductively Coupled Plasma Atomic Emission Spectrometry [J]. Chem. J. Chinese Universities, 1999, 20(3): 364.
[9]	LIANG Feng, ZHAO Li-Wei, ZHANG Han-Qi, JIN Qin-Han . A Simple Thermospray System Used in Microwave Plasma Torch Atomic Emission Spectrometry [J]. Chem. J. Chinese Universities, 1997, 18(7): 1031.
[10]	ZHANG Han-Qi, LIANG Feng, ZHAO Xiao-Jun, LI Yong, JING Qin-Han, WANG Da-Ning, ZOU Ming-Qiang, JIA Rui. An Investigation on Analytical Performance of Microwave Plasma Torch with a Pneumatic Nebulization Sample Introduction System [J]. Chem. J. Chinese Universities, 1996, 17(9): 1377.
[11]	GUO Yi-Hang, LIU Chun-Ming, ZHAO Xiao-Liang, WANG Wei-Ling. Separation and Enrichment for Multi-trace Rare Earth Elements onOxine Cellulose Coupled to Inductively Coupled PlasmaAtomic Emission Spectrometry [J]. Chem. J. Chinese Universities, 1996, 17(4): 555.
[12]	GA Ri-Di, WU-Di. Multielements Analysis of Mare's Milk Wine by Inductively Coupled Plasma Atomic Emission Spectrometry [J]. Chem. J. Chinese Universities, 1996, 17(3): 389.
[13]	YE Dong-Mei, ZHANG Han-Qi, YU Jing-Lei, Jin Qin-Han. The Application of On-line Standard Addition Method in Microwave Plasma Torch Atomic Emission Spectrometry [J]. Chem. J. Chinese Universities, 1995, 16(12): 1871.
[14]	CHENY Yuan, SUN Da-Hai, HUANG Ying-Hui, ZHANG Zhan-Xia. Real-Time Intelligent Background Correction in Inductirely Coupled Plasma Atomic Emission Spectrometry Using a Photodiode Array Spectrometer [J]. Chem. J. Chinese Universities, 1994, 15(10): 1459.
[15]	ZHANG Jin-Sheng, ZHANG Han-Qi, DUAN Yi-Xiang, XU Fang, JIN Qin-Han, WANG Da-Ning, ZOU Ming-Qiang, LIU Li. A Study on Determination of Sulfide and Sulfite By Microwave Induced Plasma Atomic Emission Spectrometry with Gas Generation for Sample Introduction [J]. Chem. J. Chinese Universities, 1992, 13(11): 1364.