Table 4. Precision measurement of chlorite ion and chlorate ion

Element	Spiked concentration (μg/mL)	Measured concentration (μg/mL) ±SD	Relative standard deviation (%)
Chlorite ion (each n=3)	1.5	1.337±0.070	5.3
	2	1.776±0.115	6.5
	4	3.321±0.137	4.1
Chlorate ion (each n=3)	1.5	1.530±0.078	5.1
	2	1.933±0.016	0.9
	4	3.890±0.040	1.0