A simple method for simultaneous determination of nine triazines in drinking water

Figures & data

Table 1. Analytical characteristics of the SPE-HPLC-DAD method.

Compound	LOD^a (µg L^−1)	LOQ^a (µg L^−1)	LOQ exp^b (µg L^−1)	RSD (%) LOQ exp^b	Determination coefficient (r^2)	Repeatability^c RSD (%)	Reproducibility^c RSD (%)
Simazine	0.012	0.035	0.045	7.3	0.9930	4.3	11.0
Cyanazine	0.010	0.032	0.041	10.0	0.9944	4.4	4.8
Simetryn	0.017	0.052	0.045	9.8	0.9990	5.7	6.5
Atrazine	0.011	0.035	0.044	5.5	0.9932	7.6	5.5
Ametryn	0.013	0.039	0.044	11.7	0.9912	5.2	5.2
Propazine	0.023	0.069	0.068	4.6	0.9926	4.5	8.6
Terbuthylazine	0.022	0.068	0.068	6.0	0.9800	7.6	8.3
Prometryn	0.012	0.037	0.042	6.1	0.9922	2.4	0.9
Terbutryn	0.013	0.040	0.045	3.8	0.9910	5.1	3.1

^a LOD and LOQ calculated as 3 × S_y/x/b and 10 × S_y/x/b.

^b Concentration values and RSD obtained for a tap water sample spiked at LOQ levels (n = 5).

^c n = 8 and n = 5 for repeatability and reproducibility, respectively (0.1 µg L⁻¹).

Figure 1. (a) Chromatogram obtained after SPE of a tap water sample. (b) Chromatogram of tap water sample spiked at 0.1 µg L⁻¹. Target compounds are numbered as follows: (1) simazine, (2) cyanazine, (3) simetryn, (4) atrazine, (5) ametryn, (6) propazine, (7) terbuthylazine, (8) prometryn, (9) terbutryn.

Table 2. Analytical recoveries for 2 µg L⁻¹ concentration of analytes (n = 5).

	Recovery ± RSD (%)
Compound	Tap water	Mineral water
Simazine	87 ± 6	103 ± 3
Cyanazine	105 ± 3	109 ± 9
Simetryn	94 ± 3	100 ± 5
Atrazine	98 ± 6	109 ± 6
Ametryn	110 ± 5	103 ± 5
Propazine	97 ± 3	102 ± 5
Terbuthylazine	86 ± 5	97 ± 5
Prometryn	100 ± 4	106 ± 4
Terbutryn	93 ± 3	100 ± 4