Table 2.

Method validation parameters for OLE, OLC, and OLA.

		OLE	OLC	OLA
Calibration curve	Slope	27,987	33,800	82,737
	Interception	−19,765	−7875	−74,897
	R2	0.9991	0.9873	0.9907
	Weighting	none	1/x2	1/x
Limits	LOD (mg·kg−1)	0.0343	0.0186	0.0334
	LOQ (mg·kg−1)	0.114	0.0621	0.111
Accuracies	1 mg·kg−1	93%	107%	87%
	2 mg·kg−1	100%	89%	101%
	5 mg·kg−1	103%	97%	113%
	8 mg·kg−1	96%	95%	98%
	10 mg·kg−1	102%	100%	110%
	20 mg·kg−1	99%	114%	94%
Repeatability Relative Standard Deviation	Intraday 1 mg·kg−1	2.3%	2.5%	5.8%
	Intraday 5 mg·kg−1	1.9%	2.7%	1.8%
	Intraday10 mg·kg−1	1.1%	5.7%	3.7%
	Interday 1 mg·kg−1	2.4%	3.3%	7.5%
	Interday 5 mg·kg−1	5.7%	4.1%	7.0%
	Interday 10 mg·kg−1	1.2%	6.0%	3.1%