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 2

Percent false negatives in spiked environmental matrices at different tolerance ranges for all 30 PPCPs.

Tolerance range	Matrix				Overall false negatives
	Influent	Effluent	Downstream	Upstream
±10%	54%	49%	47%	42%	38%
±20%	26%	20%	16%	14%	16%
±30%	13%	9%	7%	6%	8%
±40%	8%	6%	4%	3%	6%
±50%	5%	4%	2%	2%	4%