Validation data for the determination of perchlorate in water using ion chromatography with suppressed conductivity detection

Environmental Sciences Europe

Table 3 Recovery of perchlorate in synthetic matrix solutions after preparation

Sample	Matrix-free standard; direct injection	Matrix-free standard^a	100 mg/L chloride/sulphate^a	500 mg/L chloride/sulphate^a
1.0 µg/L ClO ⁻₄
Rec^b area (%)	100 ± 1.19	88.8 ± 0.28	83.8 ± 4.6	84.7 ± 4.4
Rec^b height (%)	100 ± 0.89	91.3 ± 0.41	91.3 ± 3.5	88.9 ± 2.9
1.5 µg/L ClO ⁻₄
Rec^b area (%)	100 ± 0.32	102 ± 4.9	86.0 ± 4.1	106 ± 4.5
Rec^b height (%)	100 ± 0.49	101 ± 3.7	87.6 ± 1.9	110 ± 4.0
5.0 µg/L ClO ⁻₄
Rec^b area (%)	100 ± 0.76	96.1 ± 1.9	95.7 ± 2.6	97.0 ± 2.0
Rec^b height (%)	100 ± 0.76	98.8 ± 0.84	96.6 ± 0.82	98.7 ± 0.71

^apre-treated with three layer cartridge
^bRec: recovery of the perchlorate signal in sample [Rec Peak Area = 100 × Area(Sample)/Area(Standard); Rec Peak Height = 100 × Height(Sample)/Height(Standard)]