Provides a simple, fast, economical method of pH measurement. Obtain accurate results in weakly buffered, turbid and lightly colored samples. Measures 0-14 pH. Test Strips are great for quick evaluat

Xenosep® EPA 1664A Standard, 1x30 mL, 4mg/mL. Pipet 10 mL to achieve the 40mg PAR (Precision and Recovery) Standard needed for the method. Each bottle contains enough standard to QC a batch of samples

Hach® QT Filters are recommended for use in various Hach Water Analysis Handbook Methods and other environmental reference methods. Optimized ashless hardened circles provide an abrasion resistant smo

Pliable and easy to use. Contains no heavy metals. Low alkali content. Suitable for filtering. Comes in sheets 3 mm (0.1) thick x 250 mm (9.8) wide x 1300 mm (51.2) long.

Hach® QT Filters are recommended for use in various Hach Water Analysis Handbook Methods and other environmental reference methods. Optimized ashless hardened circles provide an abrasion resistant smo