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K-1584

Drop Test, Phosphonate, Thorium Nitrate/Chrome Azurol S (uses pH test paper 2.5-4.5),1dr=0.8ppm PBTC

UPC Barcode:
840036011218

$175.83

Analyte System Method/Chemistry Standard/Equivalance or Description Comparator Cell
Phosphonate Drop test Thorium nitrate/chrome azurol S (uses pH test paper 2.5-4.50) 1 drop = 0.8 ppm PBTC plus conversion factors for other ATMP-related phosphonates NA 9198P
Test Parameter Description
Phosphonate Positive interference caused by fluoride and iron at all levels, orthophosphate > 5 ppm PO4, and polyphosphate > 1 ppm PO4; to prevent, test for interfering agent, dilute sample with DI water as necessary, and retest. Positive interference caused by EDTA at all levels.

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.

Instructions

Kit Layout

SDS Documents