Analysis of Metal Impurity Elements in Li4Ti5O12 Through Microwave Plasma Atomic Emission Spectroscopy

Hong-wei LIU; Liang FU

doi:10.3964/j.issn.1000-0593(2021)10-3021-05

Journals >Spectroscopy and Spectral Analysis >Volume 41 >Issue 10 >Page 3021 > Article

Spectroscopy and Spectral Analysis
Vol. 41, Issue 10, 3021 (2021)

Analysis of Metal Impurity Elements in Li₄Ti₅O₁₂ Through Microwave Plasma Atomic Emission Spectroscopy

Hong-wei LIU^1、* and Liang FU^{2、2; *;}

Author Affiliations

¹1. College of Material and Chemical Engineering, Hunan Institute of Technology, Hengyang 421002, China

²2. College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China

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DOI: 10.3964/j.issn.1000-0593(2021)10-3021-05 Cite this Article

Hong-wei LIU, Liang FU. Analysis of Metal Impurity Elements in Li₄Ti₅O₁₂ Through Microwave Plasma Atomic Emission Spectroscopy[J]. Spectroscopy and Spectral Analysis, 2021, 41(10): 3021 Copy Citation Text

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Fig. 1. Spectral interferences for Pb 405.781 nm corrected using FLIC

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Correction effect of ionization suppression solution CsNO3 on ionization interferences

Fig. 2. Correction effect of ionization suppression solution CsNO₃ on ionization interferences

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Fig. 3. Four-hour stability plot for analytes in Li₄Ti₅O₁₂ sample solution

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Element	Linear range /(μg·L^-1)	Coefficient (r)	MDL /(μg·g^-1)	Element	Linear range /(μg·L^-1)	Coefficient (r)	MDL /(μg·g^-1)
Mn	0.30~200	0.999 7	0.09	Fe	2.58~50	0.999 8	0.77
Na	0.16~2 000	0.999 7	0.05	Al	0.70~200	0.999 9	0.21
Pb	1.38~50	0.999 9	0.41	Mg	0.17~200	0.999 5	0.05
Ni	1.03~50	0.999 8	0.31	Cu	1.30~200	0.999 3	0.39
Cr	0.52~50	0.999 9	0.16	Ca	0.27~200	0.999 7	0.08
Zn	0.93~50	0.999 5	0.28	Cd	0.40~50	0.999 8	0.12
K	0.10~10 000	0.999 8	0.03	Co	0.82~50	0.999 6	0.25

Table 1. Parameter of calibration curve and the method detect limit (MDL)

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Element	Spiked /(μg·L^-1)	Total found /(μg·L^-1)	RSD /%	Recovery /%	GB/T 30836—2014 /(μg·L^-1)	t test
Mn	100	98.7±2.60	2.63	98.7	99.1±3.25	p=0.41
Na	1 000	966±21.2	2.19	96.6	974±36.8	p=0.33
Pb	10	9.73±0.28	2.88	97.3	9.96±0.18	p=0.06
Ni	10	9.91±0.27	2.72	99.1	10.2±0.33	p=0.06
Cr	10	10.2±0.34	3.33	102	10.3±0.30	p=0.30
Zn	10	9.80±0.19	1.94	98.0	10.1±0.32	p=0.04
K	1 000	1030±40.1	3.89	103	1 060±53.6	p=0.15
Fe	10	10.2±0.32	3.13	102	10.4±0.26	p=0.13
Al	100	101±3.06	3.03	101	102±2.52	p=0.28
Mg	100	104±2.71	2.61	104	102±3.75	p=0.16
Cu	100	98.2±2.55	2.60	98.2	101±2.98	p=0.06
Ca	100	99.0±3.14	3.17	99.0	96.6±3.69	p=0.13
Cd	10	10.3±0.29	2.82	103	10.1±0.24	p=0.11
Co	10	9.64±0.17	1.76	96.4	9.81±0.35	p=0.15

Table 2. Evaluation of the accuracy and precision of analytical methods (n=6)

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Element	Sample A		Sample B		Element	Sample A		Sample B
Element	Found	Certified	Found	Certified	Element	Found	Certified	Found	Certified
Mn	16.7±0.51	16.4	39.1±1.10	38.7	Fe	7.32±0.30	7.50	12.8±0.43	13.1
Na	659±21.0	665	287±10.4	293	Al	14.3±0.46	14.1	27.1±0.73	28.0
Pb	9.22±0.35	9.43	4.11±0.18	4.17	Mg	38.2±1.07	39.5	21.5±0.62	22.1
Ni	1.13±0.02	1.10	1.08±0.03	2.11	Cu	11.6±0.41	11.9	28.3±0.79	29.4
Cr	6.27±0.19	6.32	4.31±0.14	4.28	Ca	20.8±0.73	21.2	16.0±0.51	15.7
Zn	5.13±0.16	5.08	2.08±0.07	2.11	Cd	1.34±0.03	1.33	2.09±0.05	2.12
K	4 160±165	4190	2 530±90.2	2 600	Co	4.67±0.15	4.72	2.36±0.04	2.35

Table 3. Analytical results of Li₄Ti₅O₁₂ samples (μg·g^-1, n=6)

Hong-wei LIU, Liang FU. Analysis of Metal Impurity Elements in Li₄Ti₅O₁₂ Through Microwave Plasma Atomic Emission Spectroscopy[J]. Spectroscopy and Spectral Analysis, 2021, 41(10): 3021

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