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

Table 7

Detection and quantitation limits for three methods.

Method	Calibration curve	Correlation coefficient	Detection limit	Quantitation limit
ISAM	y = 95.75 (±1.95)x + 108.3 (±1.18)	0.9996	0.092	0.279
CCM	y = 87.92 (±0.65)x − 1.4 (±1.08)	0.9999	0.059	0.180
CSAM	y = 218.5 (±2.32)x − 3.2 (±0.2.61)	0.9998	0.032	0.097