Development and validation of a GF-AAS method and its application for the trace level determination of Pb, Cd, and Cr in fish feed samples commonly used in the hatcheries of Bangladesh

Journal of Analytical Science and Technology

Table 1 Linear regression and selectivity data of Pb, Cd, and Cr for aqueous and matrix matching calibration curves

Analyte	Linear range (μg/L)	Calibration with aqueous standard solutions			Calibration with matrix matched standard solutions
Analyte	Linear range (μg/L)	Slope ± SD (μg/L)⁻¹	Intercept ± SD	Correlation Coefficient	Slope ± SD (μg/kg)⁻¹	Intercept ± SD	Correlation coefficient
Pb	15–75	0.00084 ± 0.00002	0.00053 ± 0.00025	0.998	0.00086 ± 0.00002	0.00521 ± 0.00164	0.998
Cd	1–6	0.01941 ± 0.00019	0.01430 ± 0.00374	0.997	0.01984 ± 0.00065	0.03423 ± 0.00319	0.997
Cr	4–20	0.00607 ± 0.00002	0.02070 ± 0.00479	0.998	0.00615 ± 0.00003	0.00463 ± 0.002811	0.998