Establishing Analytical Performance Criteria for the Global Reconnaissance of Antibiotics and Other Pharmaceutical Residues in the Aquatic Environment Using Liquid Chromatography-Tandem Mass Spectrometry

Table 3

Percent false negatives in spiked environmental matrices at different tolerance ranges for 23 compounds without tetracyclines and quinolones.

Tolerance range	Matrix				Overall false negatives
	Influent	Effluent	Downstream	Upstream
±10%	48%	42%	41%	35%	31%
±20%	20%	13%	10%	8%	10%
±30%	8%	4%	2%	2%	4%
±40%	4%	2%	0%	0%	2%
±50%	2%	1%	0%	0%	1%