Table 1.

Regression equations, correlation coefficients, linear ranges and detection limits

Analyte	Linear equation	R 2	Linear range (µg L−1)	LOD (µg L−1)	LOQ (µg L−1)
Cu	Y = 38371.1x + 1119.4	0.9999	0.02–200	0.007	0.020
Pb	Y = 230129.3x + 32337.6	0.9996	0.10–20	0.026	0.100
As	Y = 2504.2x + 32.7	0.9999	0.02–20	0.010	0.030
Cd	Y = 30243.4x + 300.6	0.9998	0.02–20	0.005	0.020
Hg	Y = 34165.1x + 84.7	0.9973	0.02–5	0.006	0.020