Table 2.

Quantification limits for endosulfan

Isomer	Concentration of Standard Used (μg/L)	Empirical Mean Value (μg/L)	Empirically Derived Limit (μg/L)	EPA Limit (μg/L) [21]
Alpha-endosulfan	0.171	0.103	0.11	0.030
Beta-endosulfan	0.182	0.206	0.13	0.030
Endosulfan sulphate	0.266	0.290	0.13	0.030

* Empirically-derived quantification limit = 2 x Std Deviation of 7 samples of low concentration of respective standard