Speciation Analysis of Arsenic Compounds by High-Performance Liquid Chromatography in Combination with Inductively Coupled Plasma Dynamic Reaction Cell Quadrupole Mass Spectrometry: Application for Vietnamese Rice Samples

Table 5

Analytical figure of merits of speciation analysis of five arsenic species in HPLC-ICP-DRC-QMS.

No.	Analyte	Regression equation	R^2	LOD (ng·g^−1) (mean value ± SD, )	LOQ (ng·g^−1) (mean value ± SD, )	LOD^a (pg) (mean value ± SD, )	LOQ^a (pg) (mean value ± SD, )
1	AsB	y = (83200 ± 1300) ∗ x − (63400 ± 56500)	0.9988	0.5 ± 0.1	1.7 ± 0.3	25.8 ± 4.2	85.9 ± 13.9
2	As(III)	y = (48900 ± 600) ∗ x − (35100 ± 28200)	0.9991	2.9 ± 0.3	9.6 ± 0.9	144.2 ± 46.2	480.6 ± 154
3	DMA	y = (52900 ± 700) ∗ x − (44200 ± 32300)	0.9990	0.7 ± 0.2	2.4 ± 0.6	36.0 ± 8.5	119.8 ± 28.5
4	MMA	y = (49000 ± 700) ∗ x + (41600 ± 15700)	0.9992	0.9 ± 0.1	3.1 ± 0.4	46.1 ± 5.6	153.8 ± 18.6
5	As(V)	y = (56100 ± 300) ∗ x + (9600 ± 13600)	0.9998	0.9 ± 0.2	2.9 ± 0.6	42.8 ± 9.0	146.0 ± 30

^aAbsolute amount of the analyte injected into the column.