Overview
- We have responded with an expansive selection of professionally manufactured specialty test kits for every job. With industry-leading innovation and quality built into every kit, there is never a need to own multiple test kits or reagents that you won’t use. You’ll never have to choose between accuracy and convenience-they’re always packaged together, in every water test kit.
  
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Properties

Details

Analyte	System	Method/Chemistry	Standard/Equivalance or Description	Comparator	Cell
Alkalinity, Total	Drop test	Blended indicator	1 drop = 10 ppm total alkalinity as CaCO₃	9058	NA
Hardness, Calcium	Drop test	EDTA titration (includes inhibitors to prevent metal interference)	1 drop = 10 ppm calcium hardness as CaCO₃	9058	NA
pH w/ acid/base demand	2000 Series comparator	Phenol red	7.0, 7.2, 7.4, 7.6, 7.8, 8.0	9058	NA
Bromine, Total	Drop test	FAS-DPD	1 drop = 0.5 or 1.25 ppm bromine (Br₂)	9058	NA

Storage

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.

We formulate 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.

Research Field

Market: Pool/Spa

* For research use only.

Applications

Application

Service Professional

Application Description

Test Parameter	Description
Sanitizer levels > approx. 10 ppm may cause a blue-purple color resulting in false high readings. Wait for sanitizer level to decrease to normal levels and retest to assure an accurate reading.	pH
High halogen level may change indicator reaction from green/red to blue/yellow; to prevent, add thiosulfate prior to testing.	Total Alkalinity
Iron > 10 ppm may cause negative interference.	pH
Chlorine levels > approx. 25 ppm may bleach out indicator or cause sample to develop a brown color; to prevent, add more DPD powder or dilute sample with DI water as necessary and retest. Other halogens and oxidized manganese may cause positive interference.	Chlorine
Metal ions may cause interference; to prevent, add titrant containing EDTA to sample before buffer and indicator, then test as normal making sure to count drops of titrant added initially in total required to reach endpoint. If interference still occurs, dilute sample with DI water as necessary and retest.	Calcium, Magnesium, Total Hardness