Study and Determination of As, Cr, and Pb in Amaranth Seeds

Table 1

The operating parameters of the system ICP-OES.

Parameter instrument operating conditions
As	Cr	Pb
λ (nm) As: 188.980	λ (nm) Cr: 205.560	λ (nm) Pb: 220.353
Power: 1.2 kW
Plasma gas flow: 15 L/min
Auxiliary gas flow: 1.5 L/min
Nebulizer pressure: 250 kPa
Pump rate: 15 rpm
Sample uptake rate: 1.2 mL/min
Replicate read time: 30 s
Background correction Fitted
Replicate read time: 10 s
Replicate readings: 3