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Table 1 Prioritization of target compounds based on PI values (PI > 0)

From: Occurrence and multiple-level ecological risk assessment of pharmaceuticals and personal care products (PPCPs) in two shallow lakes of China

RankChemicalCASRQmaxF (%)PI
Tai Lake
 1Caffeine58-08-210.310010.3
 2Carbamazepine298-46-41.9701.3
 3Ibuprofen15,687-27-11.5200.3
Baiyangdian Lake
 1Sulfamethoxazole723-46-61128.61001128.6
 2Carbamazepine epoxide36,507-30-925.610025.6
 3Carbamazepine298-46-420.510020.5
 4Diethyltoluamide134-62-310.510010.5
 5Triclosan3380-34-51.2100.12
  1. RQmax reference risk quotient based on the maximum measured concentration, F reference frequency of PNEC exceedance, PI reference prioritization index