Determination of Phosphorus in Soil by ICP-OES Using an Improved Standard Addition Method

Table 2

Operating conditions of ICP-OES.

Observation direction	Radial
Wavelengths (nm)	P 214.914, Re 197.248
RF power (KW)	1400
Auxiliary gas flow rate (L/min)	0.5
Atomizer flow rate (L/min)	0.5
Plasma flow rate (L/min)	18
Observation distance (mm)	15
Gas	Argon