in isopropanol (varied conc.), analytical standard Components: 4-Chloro-3-methylphenol 2000 μg/mL; 2-Chlorophenol 2000 μg/mL; 2,4-Dichlorophenol 2000 μg/mL; 2,6-Dichlorophenol 2000 μg/mL; 2,4-Dimethylphenol 2000 μg/mL; 2,4-Dinitrophenol 2000 μg/mL;…