the most trusted name in water testing

L-0205

Laboratory, Counterlab Rx 2 (complete), DPD

$872.00

Analyte System Method/Chemistry Standard/Equivalance or Description Comparator Cell
Alkalinity, Total Drop test Blended indicator 1 drop = 10 ppm total alkalinity as CaCO₃ NA 9198
Bromine, Total 2000 Series comparator DPD 2, 4, 6, 10, 15, 20 ppm bromine (Br₂) 9056 NA
Chlorine, Free & Total 2000 Series comparator DPD 1, 2, 3, 5, 7.5, 10 ppm chlorine (Cl₂) 9056 NA
Cyanuric Acid Visual determination Turbidimetric 30, 40, 50, 60, 70, 80, 90, 100 ppm CYA 4088 NA
Hardness, Calcium Drop test EDTA titration (includes inhibitors to prevent metal interference) 1 drop = 10 ppm calcium hardness as CaCO₃ NA 9198
pH w/ acid/base demand 2000 Series comparator Phenol red 7.0, 7.2, 7.4, 7.6, 7.8, 8.0 9056 NA

REAGENT SHELF LIFE

All reagents have a shelf life, whether they are liquids, powders, crystals, tablets, or test-strip pads. If kept dry, powders and crystals are very stable; acids are also long lived. Date of manufacture is not the controlling factor when it comes to shelf life—storage conditions are more important. As with all perishables, reagents are sensitive to environmental influences and will last longer under controlled conditions.

To this end, we recommend:

  • Storing reagents at a consistent temperature in the range if 36°–85°F (2°–29°C); extreme temperature fluctuation, say from a refrigerator to a hot car trunk, causes reagents to deteriorate.
  • Keeping them out of prolonged direct sunlight. (Note: their brown plastic bottles help protect very light-sensitive reagents.)
  • Segregating reagents from containers of treatment chemicals.
  • Replacing caps immediately and tightening them carefully so that exposure to air and humidity is limited.
  • Avoiding switching bottle caps, placing bottle caps on soiled surfaces, repouring reagents into contaminated containers, or touching test strip pads.

Taylor formulates its reagents to remain effective for at least one year, with only very few exceptions (molybdenum indicator in liquid form is one; after four months old it should be tested against a standard periodically). As a general precaution, replace all reagents more than one year old, or at the beginning of a new testing season.