Speciation Analysis of Arsenic Compounds by HPLC-ICP-MS: Application for Human Serum and Urine

Table 2

Characteristics of the chromatography separations of arsenic compounds on the Hamilton PRP-X100 anion-exchange column using conditions given in the experimental sections.

No	Analytes	Abbr.	tR (min)	R	W1/2 (min)
1	Arsenobetaine	AsB	2.82	—	0.24
2	Arsenite	As(III)	3.84	1.45	0.46
3	Dimethylarsinic acid	DMA	7.78	3.51	0.36
4	Monomethylarsonic acid	MMA	14.7	4.67	0.25
5	Arsenate	As(V)	17.5	2.53	0.40

t_R: retention time; : chromatographic resolution; W_1/2: width at 50% peak height.