Determination of trace perchlorate in water: a simplified method for the identification of potential interferences

Environmental Sciences Europe

Table 2 Sample data for neat and fortified perchlorate samples (ρ = 10 µg/L, average of three replicates)

MI	Cond	RT_a	RT_b	Area (A)_a	Area (A)_b	Height (H)_a	Height (H)_b	Recovery_a	Recovery_b	PD_(A/H)a	PD_(A/H)b
mg/L	µS/cm	min	min	µS min	µS min	µS	µS	µg/L	µg/L	%	%
0	< 1	19.74	21.32	0.01913	0.02042	0.03665	0.03771
100	910	19.62	21.24	0.01615	0.01850	0.02972	0.03250	84.8	90.6	4.11	5.12
200	1740	19.52	21.16	0.01349	0.01630	0.02203	0.02590	70.7	79.8	17.3	16.2
300	2550	19.36	21.12	0.01061	0.01290	0.01577	0.01930	55.5	63.2	28.9	23.4
400	3340	19.76	21.06	0.00752	0.01010	0.01128	0.01410	39.3	49.4	27.7	32.3
500	4100	19.29	21.05	0.00302	0.00481	0.00680	0.00921	15.8	23.6	14.9	3.55
600	4890	19.23	20.98	0.00195	0.00321	0.00472	0.00669	10.2	15.7	20.8	11.4
700	5620	19.08	20.88	0.00133	0.00261	0.00346	0.00537	7.0	12.8	26.4	10.2
800	6370	19.03	20.83	0.00069	0.00163	0.00222	0.00371	3.6	8.0	40.5	18.9
900	7130	19.01	20.62	0.00026	0.00107	0.00102	0.00247	1.4	5.2	51.2	20.0
990	7770	18.91		0.00019		0.00083		1.0		56.1
1000	7860		20.62		0.00057		0.00156		2.8		32.5

MI, Matrix ion concentration for each anion; Cond, conductivity; RT, retention time; a, data series 1; b, data series 2; A/H, peak-area to height ratio; PD_(A/H), peak-area to peak-height-ratio