Phosphate (PO43-) as P

2,4,5-T-methyl ester, 10 µg/ml, Acetonitrile, 10

n-Pentyltri-n-propyltin,1000 µg/mL,isooctane,1mL,

4-Nonylphenol diethoxylate, mixture of nonylisomers,100 µg/mL,isooctane,1mL,