Some Rare Earth Elements Analysis by Microwave Plasma Torch Coupled with the Linear Ion Trap Mass Spectrometry

Table 1

Characteristic peaks of REEs in MPT-MS.

REEs	Natural isotopes (%)	Dominant peak band in MPT-MS ()		Normalized intensity of corresponding peaks		Assignment
		+mode	−mode	+mode	−mode	+mode	−mode
Y	^89Y (100)	267	337	1	1	[Y(NO3)2⋅3H2O]^+	Y
La	^138La (0.09)	—	—	—	—	[La(NO3)2⋅3H2O]^+	La
	^139La (99.91)	317	387	1	1
Ce	^136Ce (0.19)	—	—	—	—	[Ce(NO3)2⋅3H2O]^+	Ce
	^138Ce (0.25)	—	—	—	—
	^140Ce (88.48)	318	388	1	1
	^142Ce (11.08)	320	390	0.112	0.1205
Pr	^141Pr (100)	337	389	1	1	[Pr(NO3)2⋅4H2O]^+	Pr
Nd	^142Nd (27.13)	320	390	1	1	[Nd(NO3)2⋅3H2O]^+	Nd
	^143Nd (12.18)	321	391	0.419	0.458
	^144Nd (23.80)	322	392	0.8401	0.8714
	^145Nd (8.30)	323	393	0.3002	0.325
	^146Nd (17.19)	324	394	0.624	0.638
	^148Nd (5.76)	326	396	0.181	0.2247
	^150Nd (5.64)	328	398	0.1712	0.217
Sm	^144Sm (3.1)	322	392	0.138	0.1253	[Sm(NO3)2⋅3H2O]^+	Sm
	^147Sm (15.0)	325	395	0.5887	0.5767
	^148Sm (11.3)	326	396	0.4112	0.4368
	^149Sm (13.8)	327	397	0.501	0.5395
	^150Sm (7.4)	328	398	0.2562	0.2911
	^152Sm (26.7)	330	400	1	1
	^154Sm (22.7)	332	402	0.8472	0.8318
Eu	^151Eu (47.8)	329	399	0.916	0.9148	[Eu(NO3)2⋅3H2O]^+	Eu
	^153Eu (52.2)	331	401	1	1

10 mg/L standard solutions were used.
0.5 mg/L standard solutions were used.