Table 1.

Resolution, Regression Equation, Determination Coefficient, Quantification Range, Limit of Quantification, and Limit of Detection of Nine Analytes Using the Method from This Study

Elution order	Analyte	Resolution (R)	Regression equation	R2	Quantification range (μg/L)	LOD (μg/L)	LOQ (μg/L)
1	F–	3.05	Y = 0.0071X + 0.1517	0.9986	24.9–1000	7.5	24.9
2	Cl–	1.03	Y = 0.0083X + 0.0541	0.9984	14.4–10,000	4.3	14.4
3	${NO}_2^{-}$	2.92	Y = 0.002X + 0.0082	0.9979	1.5–5000	0.4	1.5
4	${NO}_3^{-}$	5.51	Y = 0.0122X + 0.0009	0.9981	1.9–10,000	0.6	1.9
5	${SO}_4^{2-}$	2.45	Y = 0.0067X + 0.0903	0.9983	9.5–10,000	2.9	9.5
6	Se (VI)	1.55	Y = 0.0066X + 0.0024	0.9999	0.5–9000	0.2	0.5
7	As (V)	2.51	Y = 0.0023X − 0.009	0.9988	2.1–7000	0.6	2.1
8	${ClO}_4^{-}$	3.71	Y = 0.0025X − 0.0045	0.9992	0.5–10,000	0.1	0.5
9	Cr (VI)	NA	Y = 0.0041X + 0.0046	0.9998	0.6–10,000	0.2	0.6

R values >1.5 are baseline resolutions.

Cr, chromium; LOD, limit of detection; LOQ, limit of quantification; NA, not applicable (Cr [VI] was the last analyte in the method run; X, concentration (μg/L); Y, peak area ([μS/cm] × min).