Table 2.

Quantitative indexes summarized of MPT-MS² method for REEs in pure water and analysis results for some real samples.

REEs	Linear equation	R 2	Linear range (ng/mL)	LOD (ng/mL)	RSD (n = 6, %)	Recovery rate	Well water (ng/mL)	Orange juice (ng/mL)
Y	y = 29.105 × c − 48.27	0.999	1–100	0.574	3–11	103.4a	31.41	135.45
La	y = 3.158 × c − 11.205	0.998	1–250	0.2	7.8–14.1	117.3b	0.759	20.33
Ce	y = 9.073 × c − 24.562	0.998	1–250	0.29	6.3–9.4	122.1b	1.365	3
Pr	y = 24.890 × c − 10.879	0.999	1–100	0.04	2.4–10.1	100.5b	0.47	0.77
Nd	y = 7.731 × c + 4.463	0.998	1–250	0.114	3.6–14.7	113.7b	6.38	1.94
Sm	y = 0.929 × c − 7.541	0.998	1–500	0.388	9.4–21.2	109.7b	0.98	396.27
Eu	y = 2.039 × c − 5.694	0.999	1–250	0.369	3–8.1	97.6b	—	0.725

^a7.5 ng/mL.

^b5 ng/mL.