Analysis of Ultra-Trace Metal Impurity Elements in Proprylene Glycol Monomethyl Ether Using Inductively Coupled Plasma Tandem Mass Spectrometry

Tan-ping LI; Ai-yang LI

doi:10.3964/j.issn.1000-0593(2021)02-0618-06

Spectroscopy and Spectral Analysis, Volume. 41, Issue 2, 618(2021)

Analysis of Ultra-Trace Metal Impurity Elements in Proprylene Glycol Monomethyl Ether Using Inductively Coupled Plasma Tandem Mass Spectrometry

Tan-ping LI^* and Ai-yang LI

Author Affiliations

New Building Materials Academy, Hunan Institute of Technology, Hengyang 421002, China

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Figures & Tables(7)

Fig. 1. Optimization of the NH₃/He reaction gas flow rate
(a): On-mass method; (b): Mass shift method

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Table 1. ICP-MS/MS operating parameters

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Table 1. ICP-MS/MS operating parameters

Parameter	Setting
RF power/W	1 550
Carrier gas flow/(L·min^-1)	1.05
Make up gas flow/(L·min^-1)	0.25
Sampling depth/mm	8
Cell gas	NH₃/He/H₂(10% NH₃ in He)
Cell gas flow rate/(mL·min^-1)	NH₃/He: 2.8; H₂=2.0
ORS bias voltage/V	-18
KED voltage/V	-8

Table 2. Background equivalent concentrations (BEC) of analytes in different analysis modes

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Table 2. Background equivalent concentrations (BEC) of analytes in different analysis modes

Isotope	Potential interferences	BEC/(ng·L^-1)
		SQ mode		MS/MS mode
		no gas	He	NH₃/He	NH₃/He/H₂
²⁴Mg	¹²C₂, ²³Na¹H, ⁷Li¹⁷O, ⁴⁸Ti⁺⁺, ⁴⁸Ca⁺⁺	2 970	411	29.8	31.2
²⁷Al	¹²C¹⁵N, ¹²C¹⁴NH	860	202	77.3	75.4
³⁹K	³⁸ArH, ²³Na¹⁶O	189 000	65 300	126	84.3
⁴⁸Ti	³²S¹⁶O, ³⁴S¹⁴N, ³³S¹⁵N, ¹⁴N¹⁶O¹⁸O, ³⁶Ar¹²C	1 560	87.4	21.0	16.7
⁵¹V	³⁵Cl¹⁶O, ³⁶Ar¹⁴NH, ³⁴Ar¹⁶OH, ³⁶Ar¹³C, ³⁶Ar¹⁵N	479	15.3	8.16	5.04
⁵²Cr	⁴⁰Ar¹²C, ³⁵Cl¹⁶OH, ³⁶Ar¹⁶O, ³⁸Ar¹⁴N, ³⁶Ar¹⁵N¹H	2 170	73.6	41.4	35.8
⁵⁶Fe	⁴⁰Ar¹⁶O, ⁴⁰Ca¹⁶O, ⁴⁰Ar¹⁵N¹H, ³⁸Ar¹⁸O, ¹¹²Cd⁺⁺	1 810	425	122	94.1
⁶⁰Ni	²³Na³⁶ArH, ²³Na³⁷Cl, ⁴⁴Ca¹⁶O, ⁵⁹CoH	316	49.7	21.8	17.6
⁶³Cu	²³Na⁴⁰Ar, ²³Na⁴⁰Ca, ¹²C¹⁶O³⁵Cl, ¹²C¹⁴N³⁷Cl, ⁴⁶Ca¹⁶OH	177	51.3	40.5	34.4
⁶⁶Zn	³⁴S¹⁶O₂, ⁴⁸Ti¹⁸O, ⁴⁸Ca¹⁸O, ³²S¹⁷O₂, ³³S¹⁷O¹⁶O, ³²S³⁴S	223	148	116	89.5

Table 3. Recovery of interference removal experiment in different modes

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Table 3. Recovery of interference removal experiment in different modes

Analyte	Interference		Recovery/%
Analyte	Added interferent	Interfering ion	No gas mode	NH₃/He/H₂ reaction mode
²⁴Mg	C (Ethanol)	¹² $C_{2}^{+}$	307	101.3
²⁷Al	C (Ethanol)	¹²C¹⁵N⁺, ¹²C¹⁴NH⁺	223	99.1
³⁹K	/	³⁸ArH⁺	851	98.6
⁴⁸Ti	S (S $O_{4}^{2 -}$ )	³²S¹⁶O⁺, ³⁴S¹⁴N⁺	1 260	102.5
⁵¹V	Cl (Cl^-)	³⁵Cl¹⁶O⁺	208	100.7
⁵²Cr	C (Euhanol)	⁴⁰Ar¹²C⁺	715	101.6
⁵⁶Fe	/	⁴⁰Ar¹⁶O⁺	1 070	97.5
⁶⁰Ni	Na (Na⁺)	²³Na³⁶ArH⁺	322	99.1
⁶³Cu	Na (Na⁺)	²³Na⁴⁰Ar⁺	450	103.4
⁶⁶Zn	S (S $O_{4}^{2 -}$ )	³⁴S¹⁶ $O_{2}^{+}$ , ³²S¹⁷ $O_{2}^{+}$	279	98.9

Table 4. Calibration data and instrumental limits of detection (LOD)

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Table 4. Calibration data and instrumental limits of detection (LOD)

Element	Linear range /(μg·L^-1)	Coefficient (r)	LOD /(ng·L^-1)	Element	Linear range /(μg·L^-1)	Coefficient (r)	LOD /(ng·L^-1)
Mg	0~100	0.999 9	15.1	Cr	0~100	1.000 0	2.18
Al	0~100	1.000 0	17.2	Fe	0~100	0.999 8	35.3
K	0~100	0.999 8	61.5	Ni	0~100	1.000 0	9.75
Ti	0~100	0.999 7	3.84	Cu	0~100	0.999 9	5.81
V	0~100	1.000 0	0.52	Zn	0~100	0.999 8	40.6

Table 5. The accuracy and precisions of method (n=6)

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Table 5. The accuracy and precisions of method (n=6)

Element	Spiked /(μg·L^-1)	Found by ICP-MS/MS /(μg·L^-1)	RSD /%	Recovery /%	Found by SF-ICP-MS /(μg·L^-1)	t test
Mg	5.00	5.12±0.23	4.5	102.4	5.08±0.19	p=0.37
Al	5.00	4.91±0.11	2.2	98.2	4.85±0.12	p=0.15
K	5.00	4.88±0.10	2.0	97.6	4.94±0.15	p=0.21
Ti	5.00	5.09±0.15	2.9	101.8	5.16±0.21	p=0.26
V	5.00	5.17±0.19	3.7	103.4	5.05±0.24	p=0.18
Cr	5.00	4.83±0.14	2.9	96.6	4.74±0.18	p=0.11
Fe	5.00	5.21±0.20	3.8	104.2	5.13±0.16	p=0.23
Ni	5.00	4.78±0.08	1.7	95.6	4.82±0.12	p=0.26
Cu	5.00	4.81±0.21	4.4	96.2	4.85±0.09	p=0.33
Zn	5.00	5.19±0.14	2.7	103.8	5.07±0.10	p=0.06

Table 6. Analytical results for determination of 10 ultra-trace metal elements in PGME (ng·g^-1, n=6)

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Table 6. Analytical results for determination of 10 ultra-trace metal elements in PGME (ng·g^-1, n=6)

Element	Sample 1		Sample 2		Sample 3
Element	ICP-MS/MS	SF-ICP-MS	ICP-MS/MS	SF-ICP-MS	ICP-MS/MS	SF-ICP-MS
Mg	2.56±0.03	2.34±0.04	1.87±0.03	1.92±0.02	2.15±0.04	2.20±0.05
Al	1.36±0.02	1.41±0.02	2.05±0.02	2.09±0.03	3.61±0.05	3.53±0.04
K	2.23±0.01	2.19±0.03	4.59±0.05	4.66±0.08	1.20±0.02	1.31±0.05
Ti	2.80±0.05	3.01±0.07	1.50±0/02	1.43±0.03	1.97±0.03	1.83±0.03
V	1.62±0.03	1.57±0.02	0.75±0.01	0.79±0.01	1.84±0.05	1.68±0.02
Cr	0.93±0.01	1.04±0.03	2.40±0.03	2.31±0.02	2.75±0.03	2.82±0.03
Fe	5.10±0.12	5.23±0.10	3.65±0.05	3.71±0.04	8.06±0.13	7.82±0.16
Ni	1.66±0.02	1.74±0.03	0.69±0.01	0.64±0.01	1.73±0.04	1.81±0.04
Cu	4.77±0.08	4.92±0.09	2.87±0.04	2.82±0.06	3.21±0.03	3.39±0.05
Zn	3.45±0.04	3.36±0.05	1.21±0.01	1.16±0.02	2.27±0.02	2.32±0.02

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Tan-ping LI, Ai-yang LI. Analysis of Ultra-Trace Metal Impurity Elements in Proprylene Glycol Monomethyl Ether Using Inductively Coupled Plasma Tandem Mass Spectrometry[J]. Spectroscopy and Spectral Analysis, 2021, 41(2): 618

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Paper Information

Category: Research Articles

Received: Dec. 26, 2019

Accepted: Mar. 19, 2020

Published Online: Apr. 8, 2021

The Author Email: LI Tan-ping (ltp_988@163.com)

DOI:10.3964/j.issn.1000-0593(2021)02-0618-06

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. ICP-MS/MS operating parameters

Table 1. ICP-MS/MS operating parameters

Table 2. Background equivalent concentrations (BEC) of analytes in different analysis modes

Table 2. Background equivalent concentrations (BEC) of analytes in different analysis modes

Table 3. Recovery of interference removal experiment in different modes

Table 3. Recovery of interference removal experiment in different modes

Table 4. Calibration data and instrumental limits of detection (LOD)

Table 4. Calibration data and instrumental limits of detection (LOD)

Table 5. The accuracy and precisions of method (n=6)

Table 5. The accuracy and precisions of method (n=6)

Table 6. Analytical results for determination of 10 ultra-trace metal elements in PGME (ng·g-1, n=6)

Table 6. Analytical results for determination of 10 ultra-trace metal elements in PGME (ng·g-1, n=6)

Table 6. Analytical results for determination of 10 ultra-trace metal elements in PGME (ng·g^-1, n=6)

Table 6. Analytical results for determination of 10 ultra-trace metal elements in PGME (ng·g^-1, n=6)