Laboratory, Counterlab Rx 2™ (complete), FAS-DPD

No matter how experienced the counter help, our in-store water-testing station makes fast, easy work of testing your customers’ water samples. The results are accurate and the treatment recommendations can be tied to the products in your inventory.

Kit Layout-1

Cat. No.	Unit	Price	Quantity
WTE1494517-01	pk	$712

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Product Details

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.

WARNING: Cancer

Specifications

Analyte	System	Method/Chemistry	Standard/Equivalance or Description	Comparator	Cell
Cyanuric Acid	Visual determination	Turbidimetric	30, 40, 50, 60, 70, 80, 90, 100 ppm CYA	4088	NA
pH w/ acid/base demand	Color viewer	Phenol red	7.0, 7.2, 7.4, 7.6, 7.8, 8.0	6125T	NA
Hardness, Calcium	Drop test	EDTA titration (includes inhibitors to prevent metal interference)	1 drop = 10 ppm calcium hardness as CaCO₃	NA	9198L
Chlorine, Free & Combined	Drop test	FAS-DPD	1 drop = 0.2 or 0.5 ppm chlorine (Cl₂)	NA	9198L
Alkalinity, Total	Drop test	Blended indicator	1 drop = 10 ppm total alkalinity as CaCO₃	NA	9198L

Applications

Application

In-Store Testing

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
Iron > 10 ppm may cause negative interference.	pH
High halogen level may change indicator reaction from green/red to blue/yellow; to prevent, add thiosulfate prior to testing.	Total Alkalinity
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
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