Turbidity Standard (100 NTU) Back Catalog number: 50385 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended PN-37S 1,2,5,7-Tetrachloronaphthalene, 1.2mL x 50ug/mL, nonane Price on request 680374 Trichloroethene, 100 µg/ml, Acetonitrile, 1ml Price on request 50439 Arsenic (As) Price on request